My late stepson was really into Magic the Gathering, which seems like an offshoot of D&D.
Yep the creator of the game Richard Garfield, made it as a game that could easily be played during "down time" at gaming conventions BUT could be carried in your pocket.
Gaming conventions at the time were basically RPG gamers and of course the majority of those were D&D players.
D&D players were the first large group of converts to Magic.
My oldest daughter gave one of her brothers - the OCD one and that’s not the weirdest thing about him - some “Magic: The Gathering” cards a few years ago. Now three of the little boys have heaps of them. Sometimes they actually play the game somewhat “as written,” but more often, they just lay the cards out and make up things about them.
I wish they’d go outside and run around more, but at least nerdiness-with-cards doesn’t result in a lot of dirty laundry.