Nintendo: Backwards compatibility with DS is the reason the 3DS has the same touch screen - Pure Nintendo
Nintendo DS - Wikipedia
Nintendo Switch DS Games: Can The Nintendo Switch Play DS Or 3DS Games, And Is The Switch Backwards Compatible?
Can You Play Nintendo 3DS Games on a 2DS? | Gamers
3DS takes longer to load DS games - GameSpot
3DS XL Repair - iFixit
Nintendo Halts Production of the 3DS Family - EssentiallySports
Nintendo announces 3DS -- the glasses-free 3D successor to the DS | Engadget
New Nintendo 2DS XL - Wikipedia
Little infographic I made about Backwards Compatibility across Nintendo's main systems. The Switch was the first in years to break this chain. How do you feel about it? : r/NintendoSwitch