I dual booted my machine Win10 and Arch on ZFS Root. Admittedly I used Win10 like 99% so there was always a laundry list of updates when I booted into Arch. It seemed ZFS broke 20% of the time I updated. It was either the silly GRUB config fix that wasn't upstreamed getting overwritten or the ZFS module build somehow failed. I got so frustrated that I just nuked the whole install.

I realize that ZFS is a weird bolt-on but the fact that kernel modules failing to build doesn't cause significant error messages and/or failure is silly. Arch is great but Arch on ZFS felt like my Gentoo days: I want to have fun using my computer, not constantly fiddling to make my computer usable.