And with the latest optimizations and the speedhacks you can play flawlessly some games even on a dated/cheapo setup some of them even in 720p/1080p!
*Kingdom Heats 1,2,RCOM and their Final Mix versions
*Crash Nitro Cart
*Digimon World 4
Combined also with a gamespeed cheat you can play alot of the most demanding ones with a simmilar (but better) effect to frameskipping but with zero issues/bugs on even older PC setups!
I hope PCSX2 team could dedicate a bit of time on PS3 BC on nonBC SKUs now that it is available to anybody. The structure of the routines is very simmilar to PCSX2 so I think what Sony did on the PS2 Classics is something simmilar to the available speedhacks plus some minor CRC hacks/patches.
...and the worlds shall reconnect