Yes and no. OpenZFS on Linux still isn't as seamless and most distros still don't make it easy to do ZFS on root. Its definitely gotten better though.

I don't see any reason to use traditional ZFS on root when ZFSBootMenu is easier and better, also comparable to BSD's boot menus.

Is there a linux distro that makes the setup of zfsbootmenu easy? I found it to be quite a bit of work.

It's still out-of-tree though, isn't it?