There are definitely annoyances, but there are workarounds too; you can add additional vdevs to expand the whole pool if you want, and data is striped across th

There are definitely annoyances, but there are workarounds too; you can add additional vdevs to expand the whole pool if you want, and data is striped across them; it even lets you mix and match different raids if you really want to for some reason. There's some current work to add a disk to existing vdevs, and I think even a semi-working PR for it now: https://github.com/openzfs/zfs/pull/15022 https://github.com/openzfs/zfs/pull/15022. Hopefully in theory that will make ZFS a little less frustrating.