This is mostly a workflow question.
I have a bunch of textures in my project folder that are shared across different .blend files. When I export these files to .glb, all textures are bundled with the model. When I export using .gltf plus textures and .bin files, Blender will make copies of my textures and store them all in one folder.
In both of the above cases, I end up with duplicate texture files, and with the project I have going on, this could escalate well beyond several gigabytes of duplicate content.
Is there some way to export to a format from Blender without including the textures, but referencing the already existing files in my project folder?
EDIT: I can see there is an option in the glTF export dialog in Blender to use material placeholders instead of exporting, but that just leaves me with empty material slots and no way to automatically reassign them.