People don't want to pay for the backward compatibility, there is no publisher pressure or other conspiracy. PS2 had it for free from the design that used the

People don't want to pay for the backward compatibility, there is no publisher pressure or other conspiracy. PS2 had it for free from the design that used the PSX-on-chip as I/O processor. Later consoles had been more integrated and the BC hardware had been additional cost. This is why BC has been removed from PS3 and Wii during cost reducing revisions.