I like the idea but I don’t think it scales. How many developers are qualified to work on Blender? It would be hard to hire for. Also you need someone that both works in your organisation and that fits in well with the blender developers so their patches get accepted etc.

I don’t think the popularity of proprietary solutions is vanity, it’s rather that switching between 3d modellers is really hard. It might be months before you’re even close to productive again. Also interoperability between packages is a huge problem. Blender only really started to get a good UI this decade, and I think you’re more likely to see it get picked up in new shops rather than old shops migrating.