Just ignore Retroboy. He his pretty well know for being impossible to reason with. Don't waste your time with him.
Back to the topic :
-PS1 : Surely possible
-PS2 : should be but won't be simple to port I think and would require some optimisation
-PS3 : ...Tbh, I'm pretty curious of that one. Or course it won't be possible, the Switch being far powerfull enough for it (heck, even high ends PC's have trouble iirc), but I wonder if it could run it at 1FPM, with bug and bé unplayable, but still "run" it. Just for POC purpose and curiosity but even then it would be really buggy and unplayable
Back to the topic :
-PS1 : Surely possible
-PS2 : should be but won't be simple to port I think and would require some optimisation
-PS3 : ...Tbh, I'm pretty curious of that one. Or course it won't be possible, the Switch being far powerfull enough for it (heck, even high ends PC's have trouble iirc), but I wonder if it could run it at 1FPM, with bug and bé unplayable, but still "run" it. Just for POC purpose and curiosity but even then it would be really buggy and unplayable