Yes, you picked the one that did well, which also happens to be the one that sold before ubiquitous smartphones were a thing. I wonder if there’s a relationship.
I immediately sold my DS to fund getting a PSP as it actually had decent games I wanted to play with much better graphics. Now that I have a job, I'd love to buy a Switch, but again...not very many games that are really appealing as I haven't been big into Pokemon and games in that arena since Red came out. I think Doom and Diablo III and Skyrim are good to see, but I'd need to see more in that arena.
Some Indie games are just great on it too. I played through Hollow Knight, Blasphemous and Dead Cells far more than I would have done if I got them on PC or PS4. They were fairly cheap too.
Except for the PSP, which sold 81 million units.