That article doesn't provide much context, but Zsys != ZFS. Zsys (and the surrounding effort in Ubuntu) are all about using ZFS as a root filesystem for Desktop Ubuntu and providing convenient features like snapshot on update (to facilitate rolling back a botched upgrade, for instance). To the article's credit, it does look like Canonical is letting this die on the vine (sadly).

But that doesn't change the fact that ZFS itself is in the Ubuntu repos, tested against Ubuntu's kernels (it's a kernel module, so this is important), and _really easy_ to install: `sudo apt install zfsutils-linux`.

Personally on my box, I boot off a small NVMe SSD formatted ext4 (installer defaults) and then have all my hard drives in a ZFS pool to store my data. If /r/zfs is to be believed, this is a common setup.