Android is still open enough. Worst case, AOSP can be forked and it will still be leagues ahead of non-Android Linux phones. That also applies to the sovereignty point. I see especially GrapheneOS and /e/OS grow because of this in local communities.

LLM-driven optimization is a good point. However, Linux desktop communities tend to be quite aggressively anti-LLM. E.g. GrapheneOS has been heavily attacked by these people for only using an LLM for security auditing. But maybe these projects will fork into LLM-accepted forks who will then rapidly out-innovate.