BTW: My comment about wanting it "taller" was actually meant serious - I'd love to see something like a U-ITX-T (for "thicc") edition, same base, but 22 mm deeper, ie. 30.8 x 33.5 x 9 cm (roughly 9.27L).
That'd allow for air coolers up to 72 mm (or 70 mm with AMD boards, or 68ish with a Gigabyte AMD board), and thus easy cooling even for high-tier CPUs like the Ryzen 9 7950X and similar. Yes, in 105W Eco mode - or even 120W manual PL -you can tame this CPU with something like the AXP120-X67.
The unchanged base format would also still allow for decent portability (eg. I got a padded photo assets / carriage backpack that fits this format perfectly well, but the P-ATX would absolutely not fit).
cu, w0lf.