The fundamental problem with this strategy is model size. I want all my apps to be privacy first with local models, but there is no way they can share models in any kind of coherent way. Especially when good apps are going to fine tune their models. Every app is going to be 3GB+
This would be interesting but also feels a little restrictive. Maybe something like LoRa could bridge the capability gap but if a competitor then drops a much more capable model then you either have to ignore it or bring it into your app.
(assuming companies won't easily share all their models for this kind of effort)