I’ve been basically using btrfs on a lot of my disks because of the features it has.
Before I switched to a borg based system, my backups partition used btrfs for compression.
My main OS disk is btrfs so I can use timeshift snapshots, which are really worth checking out if you tinker with your system a lot.
I have two more btrfs partitions software raid0’d together for my steam library, nix store and other big but loosable things.
And my main home folder uses btrfs because I think the checksumming thing it does is more reliable for error detection, and cow is more fault tollerant on power failure?
… And I now fell like I’m one of those people with an over engineered storage solution. I just never get rid of old ssds or hard disks!