All-In-One emulator for the PSP

just wondering....why hasn't anyone created a all-in-one emulator featuring the most popular emulators like snes, genesis, gba, etc.
kind of like e[mulator] but with actual relevant systems we use today. i have no idea what it takes but if my memory serves me right all the strong emu's have sources, i know snes tyl and gpsp does.
i left the psp scene after mine died and tried the nds and the emu's are not satisfying and probably psp offers the best emulators on a portable. it'd only be logical for ease of use to create a all in one emulator :)
so, anyone up for the offer?

The PSP had neither the power nor the memory for such a thing. Each emulator has to be particularly geared towards the PSP to get enough speed... and some are still working on that. Even modern PCs don't have such a thing as an All-in-one emulator, and they have plenty of power and memory.