Synology has had btrfs for a while. Their latest release just made it available for more models. That said, when I bought a 916 last year, I ended up sticking

Synology has had btrfs for a while. Their latest release just made it available for more models. That said, when I bought a 916 last year, I ended up sticking with just ext4 as I needed something that would definitely work. I anticipate that I will at some point switch over.