I'm more optimistic. What you may or may not know is that bcachefs is a tweak on bcache, which has already been mainlined and is pretty stable (I've personally

I'm more optimistic. What you may or may not know is that bcachefs is a tweak on bcache, which has already been mainlined and is pretty stable (I've personally been running bcache for a couple years on my home linux machine). The point is a lot of the things you bring up are already covered by bcache. Bcachefs "just" adds a filesystem layer on the bcache tree structure.