Really big productions for really large clients don’t do work remotely.
Data is usually only shared between branches of the same company.
Say ILM San Francisco and ILM Vancouver. So its still pretty much internal to ILM.
Big Film Studios like that.
And a lot of these VFX studios are located in big ‘cg community’ cities so often don’t need to look for more obscure artists in remote places around the world. The artists come to the cities where the work is-then move around from studio to studio if they like the place.
So ‘remote work’ isn’t part of such core pipelines. The pipeline complexity means everyone works inhouse.