Shawn Layden: PSP manufacturing final number is 82.5MM+ units.

[BasilZero]

dane007 said:

PSP was such a good machine killed by lack of support and their proprietary memory cards and umd disk

PSP didnt have the proprietary memory cards - that was the Vita.

PSP had better first party support than the Vita too technically.

UMD Disk I agree was a bad idea.