>Nintendo New 3DS: plays Nintendo DS, DSi, and (old) 3DS games
I know HN doesn't have any room for sarcasm but I couldn't not laugh trying to remember what were the NEW 3ds games. Sure the second pad made the 3DS way more comfortable to play, and 3D was a bit better, but we all got scammed here regarding games supporting this new hardware.
IIRC Xenoblade Chronicles and Fire Emblem Warriors were the only ones I really cared about. Lots of people held onto their old hardware; probably wasn't worth excluding them.
The biggest advantage of owning a New 3DS turned out to be the huge performance uplift. A fair number of games ran at double the framerate or only supported 3D mode on the newer hardware. Code Name STEAM had substantially less downtime on the New models because the AI could process turns faster. Several reviews for Hyrule Warriors Legends flat out said not to buy the game unless you had a "New" model due to performance issues.
The New 3DS consoles did have double the RAM and an improved CPU and GPU, so there were quite a few games like Minecraft and the SNES Virtual Console that could only run on the New models.