Sony Confirms PS5 Players and PS4 Players Will Be Able to Play Together

[sethnintendo]

think-man said:

Random_Matt said:
Importantly confirms 30FPS, no thanks.

You do know that's not how it works? Do you think PC players are locked to the framerate of the lowest player. 60 fps and 30 fps can play together just fine. 

Internet connection is probably the main factor for online performance between two people's experience but that happens on every system.