??? ???? ???? ??? ???? (?? ?????? ??? ????? ????? ???? ?? ??? ???? ???? ??? ??? ???)With previous components architecture currently being carried forward to the next consoles, Microsoft and Sony have emerged as potent advocates of backward compatibility.???? ?????? ?? ??? ???? ??????? ??? ?? ?? ???? ??????? ???? ??????. ?? ??? ??? ????? ???????? ??