That review was the one I wanted to see : using real ATX motherboard..
Regarding opened point of this video about rear exhaust fan, I will push for slim 120mm spinning at 800-1000rpm just to exhaust potential static hot air..
If you combined P-ATX with MSI B550 Unify...you can get 4 m.2 SSD with heatsinks AND pretty good sound card (ATX boards are WAY better than ITX on sound card)
And normally it's easier to fit smaller top-down coolers on ATX motherboards.
You are making me thinking..
What about pcie gen 4 riser? Is it coming please or could we use easily alternate one?
As all new enthousiasts parts are "unavailable" it will let me some time to think about my eco-system.
Basically I'll keep my Cerberus-X but P-ATX v2 could replace my SM550...to be studied..