But I don't see why this needs to be done on a state-by-state level, a sovereign EU model seems to be much more realistic in terms of funding.
The annoying part of optical matrix multiplication is the conversion from electronic to optic and back.
Why not use electron-optics for matrix multiplication and use dynodes for amplification.
Society can't depend on the whims of the private sector.
Yeah we can, we do it all the time. Nothing in society works without relying on private actors to keep doing what they have always done. Unless you go full soviet command economy, which in fact works worse.
The next thought is culture-specific workflows, requirements etc that are best trained into weights by people that actually understand those needs.
Not all needs are going to be met by using or finetuning general purpose models, so ability to build your own SOTA ML models (LLMs or not) is also important.