Anyone planning on ZFS or BTRFS for file systems?

[Arwen]

I like Butter for mount -o compress. Never tried anything other than ext3/4 for the root partition though. F2FS works well on my Rasperry Pi too... I even made a video:

https://youtu.be/UZ6R4zciWeM

BTRFS worked reasonably well for root FS.

Initially I had to use the sub-volume numeric ID for booting, (when booting non-default root FS).
But, within a year, (2012 or 2013), they started supporting sub-volume names for root FS. That
made things easier. I could add the grub entry first, and then make the snapshot. Thus, both boot
environments had the updated grub entry. Otherwise I had to manually copy it over because I
could not predict what the snapshot's sub-volume numberic ID was before hand.