LOL, you can’t be serious. PC case design has largely been unchanged for the past 25 years! Same industrial metal cases. Giant ass cases because x64 like heat and power. Fat cables.
I have an old NAS from 2012 and it’s about as remarkably boring as a case from 2022.
All they did was add grills and screw holes to mount giant ass fans and a coolant block. The entire PC industry largely remains unchanged.