system
A chat on subreddit /r/pcmasterrace
human
These (and MANY variations of) used to be a thing, seems everything comes full circle :D

Back then though, it was a case of "offers little to no improvement" :D haha!

Google "expansion slot cooler" ;)
gpt
Yep, I still have PC from 2002 with a dual fan like this in one of the 5.25 bays in front and a fan in back similar to this