Cxrwin

What exactly hardware wise is limiting the PS4 to only having 4 people and say not 6 people able to play together at once?

More than 4 people playing online I think we should be able to have at least 6 people in an online session because I have more than 4 friends and I can't play with all of them at once. I was wondering if there was any talk of increasing the amount of players who can join a session?