I currently use btrfs on almost all my server and offline backup drives mainly because of the ability to transparently compress files to save space. But apparently btrfs can get corrupted if it unexpectedly loses power? Is there a more robust and corruption resistant filesystem that you’d recommend that also has the ability to compress files?
Are you using RAID at all? If so ZFS is probably the way to go. If not I think it matters less whether you use either btrfs or ZFS.
Regarding btrfs and power loss:
https://unix.stackexchange.com/questions/340947/does-btrfs-guarantee-data-consistency-on-power-outages
…btrfs is designed to only experience data loss not corruption, assuming well behaving hardware in power outage scenario. In practice ZFS has more maturity overall (definately) so may be better (my speculation).
Beyond direct comparisons if you already have on and offline backups then you are protected from power corruption and only have to worry about data loss anyway?