Glorious! Many thanks to the team! I may have to violate my personal policy of waiting a couple months before upgrade!
One question for anyone that might know...
I'm currently on 21.10 with Alder Lake (i5-12600K) + AMD Radeon. Other than minor niggles, its pretty stable with the newer hardware. Michael over at Phoronix did a story recommending installing a newer kernel (5.16 or 5.17) with 22.04 to get all the Alder Lake specific kernel goodness. If seemed to go smoothly for him installing from Mainline, but he was testing with "regular" Ubuntu and not UM.
I'm curious if there's any obvious Mate specific show-stoppers that would make this a bad idea? Or maybe, worse idea, since there's the obvious risk of not using the shipping kernel of course!
Edit: It appears that these changes are already making their way toward insertion into an upstream kernel 5.15 point release(s). So, I guess I just need to be patient for a while longer.
Cheers!