I have dug out my 3DS from one of the drawers, still in great condition after all these years (it's the launch one). I still had Donkey Kong, Layton and the Miracle Mask, Mario Kart and Mario Bros 2 cartridges so started playing DK and having a blast so far. Went and bought some of the Nintendo Selects games and Fire Emblem Awakening before the prices inevitably rise in the next couple of years, and now considering buying a New 3DS which I used to own a few years back but then traded it in for Switch, not sure whether I really need it though.
One thing that I find quite surprising though is that I remember using 3D quite a lot 8-10 years ago when this was my main handheld, and do not recall having any issues with it. Now after using it for just a few minutes I started feeling sick, nauseous and my eyes begin to hurt. Don't know whether it's the age difference as I was 24-25 back then and am 34 now but it's a very different experience. I have for now turned it off completely as you don't really need it to enjoy games, pretty much the only reason why I am inclined to purchase New 3DS is that 3D was supposed to be much more stable there.