Johnw1104 on 16 June 2017
He's obviously right, but Sony knows a big part of picking a console is making sure to get the same one your friends have so that you can play together (I know a group of us made the decision collectively in my case), and while cross play would be the decent and nice thing to do, it would potentially weaken their stranglehold on this current gen while offering Sony itself few to no real benefits.
If the Xbox1 had gotten off to a fast start and PS4 stumbled out of the gate, I've no doubt Sony (and potentially Microsoft as well) would be singing different tunes right now. Hopefully cross play will become common enough between Microsoft and Nintendo that Sony, in time, starts to feel some pressure to join in.
