So what's the point of using a COW-based filesystem, and then just disabling the COW and sacrificing features that require that. Sure, you can still do snapshot

So what's the point of using a COW-based filesystem, and then just disabling the COW and sacrificing features that require that. Sure, you can still do snapshots (which will do COW on the modified data), but you lose compression and checksums. The compression is not really that interesting on OLTP I guess, but losing checksums is a major PITA because it means the filesystem is no longer resilient to torn pages (at least that's my understanding). Which means you have to enable full_page_writes in PostgreSQL, which has impact on performance. So how is BTRFS+nodatacow better than EXT4+LVM, for example?