Oh you never lost data with btrfs, but you might give up following the trail of mailing list posts and wikis one fine spring morning when it failed to mount. I

Oh you never lost data with btrfs, but you might give up following the trail of mailing list posts and wikis one fine spring morning when it failed to mount. ISTR hours-long repair operations and a level of desperation that a lot of people wouldn't have had time for. This is assuming you didn't use its RAID or other features that definitely would eat your data. (This is experience from 10 years ago when I was looking for the latest and greatest features to support a hosting platform)