That's downplaying how Sony tried forcing everyone to switch, once they'd already bought UMDs. They just could not stop themselves from fucking over their own customers. Buy a PSP! It needs Sony's special memory cards. No, extra-special ones, not the kind your Sony digital cameras use. Upgrade your PSP! Fuck you, buy new memory cards. Yeah it's the same shape, but it's special-er, you peasant. Upgrade your PSP again! And throw out all your games, because we didn't include a slot this time! It's all on the memory card, and of course you have to buy a new one, from us, specifically for this single gizmo, priced like it's made out of gold recovered from deep-water shipwrecks.

If they'd just launched with forced internet connectivity it might be a different story. God knows the OG PSP never spent long without getting leashed to a wall, so yet another game could forcibly install new firmware, once your battery reached exactly 100.0% charge.