I highly recommend BTRFS as your root filesystem, and then configure snapshots. This way if an update goes sideways (pretty rare), you can roll back and wait for fixes.

I haven't used Arch for a few years, but my openSUSE Tumbleweed install came with it by default, and it has saved me a few times in the 7 or so years I've used it. Maybe the new instructions include that, idk, but you'll be glad you have it.