> the retro games they remember fondly were good despite their limitations, not because of them
I disagree with this part. To quote Orson Welles, the enemy of art is the absence of limitations. I think the limitations were a big part of what made them come up with the ideas they did, and if there wouldn't have been limitations it would have jumped right into my least favorite shits like 1st person shooters and flight sims.
Today it's not the same situation with people wanting to make retro genre games though like you said, we already had the explosion of game genres in the 80s and they might as well make it on a PC. The groundwork was done decades ago.
A lot of retro fans, I think they really want a new cartridge based system, games being on manly and solid hardware instead of a feminine downloaded app or lame disc.