That news item is only saying that wireplumber will activate pipewire as an audio server, and won't allow you to use it for video only (with pulseaudio serving audio).
It's irrelevant for those who've picked pipewire as audio server specifically, so it will most likely be irrelevant for Ubuntu.
Plus the Ubuntu 22.10 release is in October 22 (they use calendar versioning), so there's still some time to work out the kinks.
Arch tried to switch off from `pipewire-media-session`, because it's merely a proof of concept whose development is dead, but found that WirePlumber simply isn't ready yet (https://archlinux.org/news/undone-replacement-of-pipewire-me...).
It seems like, unless and until WirePlumber is actually ready, PipeWire isn't quite ready?