I purposefully have the original PS3 for the hardware compatibility. But I thought it was fully software emulation in later hardware but it was partial? Well I

I purposefully have the original PS3 for the hardware compatibility. But I thought it was fully software emulation in later hardware but it was partial? Well I guess that would at least give an explanation. I knew it was buggy, but it always felt odd to remove it since even a buggy option would have been better than no option. But if it did still have some hardware component that would explain it.