I use both, for different use cases. The flexibility of BTRFS is hard to beat, I've yet to have a single data loss issue (5ish years, multiple machines), and fo

I use both, for different use cases. The flexibility of BTRFS is hard to beat, I've yet to have a single data loss issue (5ish years, multiple machines), and for low resource systems (like an RPi3) it's a great choice. I have to say as a Linux user I find the ZFS tooling surprisingly difficult, and I've had far more issues with Linux on ZFS root than BTRFS. YMMV. On my one BSD machine I currently have a usb-attached zpool that seems completely frozen in spite of reboots for over a week -- all zpool and zfs commands hang indefinitely with no output (even though the machine is otherwise working fine). No idea what to make of that, was working fine for 3+ years previously. That said, people far more knowledgeable than me far prefer ZFS, so I keep my really important long-term storage and backups on a RAIDZ2 array.