Apparently it's a meme and Zoomers are huffing their Steam Deck exhaust. Hmm.
From the descriptions I've read the smell is similar or identical.
Maybe they use the same magic ooze.
Ethyl acetate is used to wash flux off PCBs.
It's also used as an artificial flavoring in British "pear drops" which is probably why some people say it smells like pineapple.
It is a sweet odor, but chemically irritating. It cannot be good to breathe.
I'm shocked no one has identified the source of the odor yet. Is it thermal paste? Flux/solder paste? Turtle jizz?