All Sony consoles had it before PS4, in fact Sony started it. BC was not even a thing till PS2 came along and they continued it with PS3 (which originally was BC but it lead the HW issues).
We never had it before, and all was fine. Really there is no reason why they couldn't just install an emulator via firmware update or in the store and let it go like that. The problem is wether or not the owner of the IPs for these older games will allow games sold for PS2 to be played on PS4. Sure Sony is to blame for some, but publishers want every penny they can get and if they can resell it at a cheaper price and minimal effort, thats what they are gonna do.
Now the only reason the X1 is doing it is because they need something to stand out, or I promise you they would follow suit. As you can see however, not all games will be BC on that either as some publishers will not allow it.
Nintendo Switch Friend Code: SW-5643-2927-1984
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