And if you care about data integrity, you shouldn't be using these. It's zfs, btrfs if you don't want to deal with the licensing issue, or bcachefs (though it is pretty new at this point)
Running a database on ZFS results in reduced throughput, while Btrfs and Bcachefs are outright performance disasters. [1][2]
[1] https://www.enterprisedb.com/blog/postgres-vs-file-systems-p...
[2] https://www.phoronix.com/review/bcachefs-benchmarks-linux67
After some googling it seems bcachefs is related to bcache but is a fully fledged filesystem rather than just a cache. Looks interesting.
FUD. i've been using ext4 since it came out (and ext2 and ext3 before that), on dozens of computers, and have literally never once had any corruption with it. With XFS i had one instance of filesystem corruption way back in the early 2000's. i've read of _many_ more cases of data loss with ZFS and Btrfs on Linux than i have read about due to ext4 corruption.