Had(have) a Laptop that crashed reproducible when touching it wrong. Had a few btrfs corruptions on it and after a while got enough. Have it running bcachefs as rootfs for a few years now and had no issue whatsoever with it. Home is still btrfs (for reasons) and had no data loss on that either. Only problems I had were fixed through booting and mounting it through a rescue system (no fsck necessary) had that twice in 2 years or so. Was too lazy to check what the bcachefs hook (aur package) does wrong.
Edit: Reasons for home being btrfs. I set this up a long fucking time ago and it was more or less meant as a stresstest for bcachefs. Since I didn't want data loss on important data (like my home) I left my home as btrfs
I've not dared try bcachefs out though, I'm quite wary of data loss, even on my laptop. Does anyone have experience to share?