The last jam game I made made me realize how terrible my glb/gltf loader was (in practice I was only getting one mesh and skin from a file, which was enough for some games while I was the only one making models), so I started making a proper model loader and viewer. I'll probably not support all material features and extensions, just enough to make prettier games, and I try to support all kinds of animations as well as possible.
https://streamable.com/u7txk8
The steps after this is advanced enough is figuring out a proper binary custom format for my needs, and make sure my engine can manage materials slightly better.