It doesn’t make any sense to yield for so long, especially in the case you are considering (huge maps). For instance, loading a 15,000 parts map would take at least 25 minutes to load, while if you just insert it as a whole could take up to only a few seconds (maybe a minute in very low-end devices if it included large parts or unanchored components).
Also, @HeIIo42bacon, excellent tutorial! I think you explained it so well. Loading maps is essential for a lot of places and genres, so this topic will be for sure very useful for many devs!
I think you could add that changing HumanoidRootPart’s CFrame will overwrite the character’s rotation, while MoveTo will conserve it. This detail might be useful for some gamemodes.
But again, thanks for your contribution!