ps2 you can have free mc boot with internal hdd !!An ODE for the PS2 would be even better.
The drives are so picky with scratched PS1 discs and the only good way to play PS1 on a PS2 is the official way, POPStarter doesn't work with many games and if it does they have issues.
One could buy a modchip for 5 bucks to solve the PS1 problem this way, but an ODE would be even cooler.