"Due to potential legal incompatibilities between the CDDL and GPL, despite both being OSI-approved free software licenses which comply with DFSG, ZFS development is not supported by the Linux kernel"
@petrillic @mcc I am only n=1 but will mention I use ZFS on all my single-drive systems (mostly laptops) and have zero complaints with performance. I appreciate being able to back up entire filesystems to my NAS (also ZFS) with checksums, snapshots, encryption etc. intact.
My biggest frustration is the lack of rebalancing support, specifically on pools big enough I can't copy everything off. Having to install separate kernel modules is only a mild irritation for me though, YMMV