You've been able to boot Ubuntu from ZFS for a while now, it just required you to drop to a shell, create your pool and then manually install onto it. Now that

You've been able to boot Ubuntu from ZFS for a while now, it just required you to drop to a shell, create your pool and then manually install onto it. Now that it's fully integrated into the installer, you'd have to have a really good reason not to use it. It's just so much better and battle tested than any of the alternatives.