If BTRFS is messing disks up in the wild today, I haven’t heard about it. You’ll find a few people saying that BTRFS messed up their disk in the past and they won’t touch it anymore, but Facebook runs all their stuff off BTRFS, and OpenSUSE+Fedora are shipping BTRFS by default to their users as well. We’d be hearing about it if there are real problems. Unfortunately, it’s easier to just say “BTRFS isn’t 100% stable because in the past it had bugs” and never touch it again, and it’s very hard to ‘disprove’ that claim because the people who have had problems are very few and far between - maybe you just haven’t hit their edge case yet. BTRFS has been around for a long time now, and at this point it’s probably going to be easier to just champion BcacheFS than try to remove the stigma around BTRFS.

If your server is a personal server I would feel free to use BTRFS if you feel the rest of its featureset fits your usecase. If you’re dealing with other people’s data/enterprise then I would try to use ZFS or something else, “just in case”.