This is still necessary.
As a Roblox developer who does not specialize in UI design it is difficult to make custom shapes that cannot be found in the toolbox or online. I am a better modeler in Roblox Studio than I am in external software like Blender. It is much simpler to use Studio for basic models however Blender is probably better for more complex stuff. Same for UI design: I am better at using Studio’s UI tools than I am using external programs. And you could probably get more out of an external program meant for this kind of stuff however some users might prefer to use Studio’s built-in stuff.
unless it’s for programming
This would be great for cutting holes in frames for stuff like binoculars or scopes for guns. The current solution is to make it yourself in another software, then wait for moderation to approve which is a waste of time, or get lucky that you can find what you want specifically.
Please consider this, it would make UI design on Roblox so much easier and allow for more creativity.