Yeah, my bad. I’m reading this quickly.
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VehicleSeats will go completely unchanged afaik as this only pertains to the creation of new joints within JointsService.
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This is making me have flashbacks to the time I tried programming ragdoll physics with no prior physics experience because I didn’t know that Glue joints existed or what they did or that they NOT ONLY BREAK ON IMPACTS but ALSO FUNCTION AS BALL JOINTS??? I only wonder who decided this name and why because I see no relationship to GLUE???
(Shuddering intensifies)
This is a perfect example of why this behaviour should go. Now we have… BallSocketConstraints! And they aren’t a massive pain to make! (Or break on impact…)
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So what will be the future of vehicle seats now? I know pre-existing vehicle seats and the joints will be preserved, but what about later on?
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Will the surface tool be removed completely at some point? If it has no real purpose anymore so I would just prefer removing it completely to make room for new tools that might be added in the future.
Someday, but some people want to still apply those surfaces for visual aesthetic. So it won’t be removed until there is a better alternative.
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I think the best way to do this is using the lovely collection of part adornments that studio provides.
Wow, an arrow! And it only took a cone and a cylinder adornment. People should be using this instead if they desperately need to mark the direction of their parts (if there is nothing else marking the direction already for some reason), rather than trying to use a legacy feature that has had no real purpose for years.
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There are no plans to ever cause existing VehicleSeat cars with hinge surface Rotate joints to break, this would be too disruptive to existing games.
Otherwise the future of the VehicleSeat is unknown, it’s functionally deprecated, and has no plans to be updated or improved in any way.
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This is cool! Hinges have always been annoying. Glad that this is fixed.
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Yes that’s also a good alternative! I’ll add it to the list of alternatives in the main post
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VehicleSeats themselves still serve a valuable purpose for scripted vehicles actually. They provide the perfect interface for that type of code because they handle all of the movement and camera stuff for you (I think they’re actually entirely handled in controller modules iirc so there’s virtually no non-lua code in that situation which is what I think is what Roblox is aiming for. (We are seeing everything being ported to lua, the stepping stone originally being controller code which is now leading to, Humanoids as we saw in the AvatarEvolution build, the draggers, etc)
I love the idea that we will be able to modify, and at least see every little piece of code in the engine. I am going to guess Roblox intends (or at least will eventually end up intending) to write a lot of content on the devhub for custom vehicles and such in the future (there’s already quite a bit on there, such as the “car kit”).
This fits with everything that I think Roblox aims to be, and, I look forward to firstly the awesome performance, the awesome lighting, and the awesome modeling features, but, I also look forward to the content Roblox will produce in light of all of this.
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I need to create unions with a certain orientation. Back then when SurfaceTypes was a thing (a couple hours ago) I could just go to the properties of the part and click a surface to see that yellow selection in its corresponding face in the union hitbox. But now I can’t 
Do I really have to use decals, textures or surfaceguis now? That sounds so unprofessional…
Edit: it is still possible if we use the Model > Parts > Surface option to change any smooth surface. I hope they don’t remove this option anytime soon! (Imo we don’t need “a better alternative” for this, but we’ll see. Roblox is making amazing updates lately!)
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I’ve been using Hinges for quite some time now and moved on from that into the alternative way which is much easier to control and customize, but seeing that some tools that I usually use to benefit my workflow being deprecated will be sad to see go away from Roblox as I usually use hinges/motors to detect a part side or to make spinning parts function as they should.
(sad 3D Noises) 
A question that I have is that will most of the Developer Hub articles be updated and changed since Hinges/Motors are being removed as some tutorials use them? It might be obvious but I just wanted to know.
I really do prefer some sort of setting where it can show an arrow on all sides and maybe when you hover over it, it can tell you what side you’re moving like FrontSurface or LeftSurface as it would benefit most developers a lot.
Side note on what I said above: Hinges/Motors were something useful for developers now and mostly in 2013-2016 when they had to remember or use those two components from a couple of minutes ago to decide what side is this on for some sort of model; not all of us agree that it was not a reliable solution as it’s so much easier to do so that part I kind of disagree with a bit.
Anyway, I like to see these changes that are coming to September 7th a bit more later or early if I have a certain situation but a concern that I have with removing the surface tool/section is that it will be a bit harder to change and customize part surfaces nowadays as I have to be careful when selecting multiple parts or even a whole model to change the surface that I need, such as Universal, Smooth or Hinge.
^ Only if there was a replacement in the future which I hope. 
Anyway, sad moments into Roblox studio but changes have to be made.
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As stated in the original post, they are aware of this use case. However, using SurfaceTypes was not a “professional” solution at all. At the time being, you can alternatively use attachments, adornments, images, or the view selector.
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The view selector doesn’t work in local space though 
so it can’t be used to determine which face of a part is, for example, its front surface.
But as stated on another post, the “Surface” option is still fully available, so we can still use it!
Also I’ll miss hinges btw
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A tutorial for this new feature might be extremely helpful for new developers like me. Something on the DevHub or here, at the #resources:community-tutorials category.
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Aww man I used those
I admit, the new hinge constraints are are a lot better than old ones, but what if we wan’t some visual hinges? Will that be added to hinge constraints?
EDIT: nvm found a solution
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Cool and all, But now there’s no clear way to tell a parts face without putting something like a decal on it.
Some times I really need to know what face is the front, right and top ,but now this is now very difficult to do.
Maybe an option in properties to show some lines sticking out of it to show what face is which
made a plugin to solve this problem lol go check it out or something
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People concerned about losing the ability to see which face is the front face of a part should create a feature request to add this functionality in another way, since this was always unintended usage of this feature in the first place!
E.g. making the draggers show face labels next to the grab handles when in local mode.
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