glTFast does some weird duplication of data with gltf + textures (it embeds textures again), think UnityGltf handles that better
I think it was gltFast that put me off using GLTF separate + bin when I used it for my Silent HIll VR gallery app for that same reason
by user 103054507105067008
UnityGLTF handles it great
by user 103054507105067008