I don't think hardware limitations was an issue. Remember when they said vault space can't be increased?
I'm just waiting for RoI to drop and see what [i]features[/i] that's so important that RoI [i]has[/i] to be only on next-gen.
Honestly though. I think they just don't want to provide services for legacy console since they're on the way out. Plus, as a business, there can be easy money to make. Bungievision signed contract with Playstation and this is a way to help make sales on Ps4 too. Ps4.5 is coming out too so gotta get rid of all that overstock ps4. As a business, it's win win. But for the customers, there will be plenty of wallets waiting. Purses too.