In general playing games on original hardware is going to be a better experience than running it in an emulator.

Tbh, I think that depends. On the 3DS it does make more sense, you are right, especially if you want the 3D effect. That one is really not replicable.

On a New 2DS XL without the 3D effect, I don’t know… Most games I played don’t really use the touch screen a lot (though that obviously depends on the games) and a phone with a portrait-mode controller can replicate the dual-screen quite well.

But yeah, everyone has their own preferences.