I haven’t been keeping up super close with this, but from the posts by Linus I have seen, I got the sense that he doesn’t really care about bcachefs stability as much as the fact that Kent’s changes keep touching common code at a time when they’re hardening. If they were isolated to bcachefs I don’t think Linus would care at all. And Linus keeps telling him not to try that, and Kent acts like he’s being singled out and persecuted. That’s my current understanding.