I think they have some improvement to do on supply-chain though. A lot of random COPRs and kernel patches pulled in from various random third- and first party repos that I think should get consolidated before I can consider it mature and really ready for prime time.
Similarly it would also be nice to see end-to-end builds being reproducible locally. (Things are currently hardcoded to github.com or tied to GitHub Actions in a few places. The patching required for that is nothing crazy - Good First Issue material :))