There are plenty of reasons for BC:
1. People trade in the previous console to pay the new one.
2. People didn't own the previous console, but want to enrich the game-library through BC.
3. People that don't want to plug gazillion of devices into their TV and switch between them, only because they feel like playing another game.
Look at it: BC is an added value. For some people - like the author of the article - it is not much value, but for others it holds more value. This value will be counted into the decision to purchase a console or not. So basically manufacturers that leave BC out hurt themself. In which degree is debatable, but the value of the device they offer is lower than with BC included.







