The DS. Touchscreen, excellent battery life, the clamshell design protected the screen while being carried around and sent the system into sleep mode as soon as closed without pressing any other buttons, a software library of over 3,000 games, backwards compatibility with GBA games, and no need for costly proprietary memory cards.
PSP memory cards weren't really expensive at all. They were made by a lot of different companies. I think they were just digital camera memory cards. I'm sure they were more expensive than nothing (DS didn't need anything extra) but it wasn't a PlayStation Vita situation.
One thing about that clamshell design that plagued the original DS--broken hinges. All three of my originals broke. The Lite was awesome, though. And it had muuuuch better screen quality.Last edited by d21lewis - on 22 May 2020