[Raion]

Copy-on-Write is a very specific filesystem setup not suited for low memory infrastructure or plain, just really ugly and complex. It doesn't have some of the raw single disk performance of a traditional FS, and while checksums are fine in COW (because snapshots) if none of that is set up, e.g. for a user that just wants something that "works" or that lacks the memory and background resources, checksumming on a normal filesystem is just a plain annoyance.

COW systems are not my personal thing anymore. It's a meme, a pseudo-killer app but we didn't need it for nearly 40 years prior, so we probably don't need it now.