I ran into a bunch of issues with it on a headless userless system. Unfortunately, like pulse, it's deeply integrated with dbus/policykit/xdg stuff. Wireplumber was looking for XDG_HOME_DIR and breaking when it couldn't find one, dbus issues when doing things from root services, Jack clients couldn't connect, etc.

I'm prepared to like it better than pulse, and alsa has its warts, but I'm not 100% convinced yet.