Specifically zfs-dkms + the stable kernel package ("linux") can often be an issue because I have seen the kernel version updated by Arch without ZFS support for

Specifically zfs-dkms + the stable kernel package ("linux") can often be an issue because I have seen the kernel version updated by Arch without ZFS support for that version (obviously not something that the Arch kernel package maintainers should care about, but it's a bit inconvenient). zfs-dkms + "linux-lts" (longterm kernel) seems to work better than zfs-dkms + linux (stable kernel) if you're intending to do frequent system updates - I've been running this on several machines for years with no issues.