The DS came out ~21 years ago, in 2004.

In 2004, the games I played that had come out ~22 years prior, give or take two years, were already considered retro: Donkey Kong, Pitfall, Pac-Man, Asteroids, etc. And ~21 years prior was the great video came crash of '83.

Suffice to say, we're dinosaurs. I've made my piece with it and spend a considerable amount of time listening to old British dudes break down 30 year old games.