ZFS isn't what lets you down in the ZFS stack. It is memory fragmentation due to ARC, and the ARC not responding to memory pressure correctly. I'm sure there'

ZFS isn't what lets you down in the ZFS stack. It is memory fragmentation due to ARC, and the ARC not responding to memory pressure correctly. I'm sure there's parts of btrfs that still suck. Don't get me wrong. And you can do the running out of space, so you can't remove files trick with ZFS too ;). Personally, I only put btrfs into use on my laptop about 1.5 years ago. So... Take that for what you will. I'm pretty conservative.