In what I regard as taking longer than it should have, Sony has announced Rocket League is now cross play compatible with all other platforms.
For a while now, everyone else could play with each as long as the person wasn't on the PlayStation 4. That ended yesterday with Sony turning on the feature to allow for those on the PlayStation 4 to play against others on an Xbox One or a PC or a Switch.
I'm glad to finally see this come into fruition and let's hope we'll see more and more games do this in the future without any restrictions. We shouldn't be limited to who we play with based on their platform of choice and with Sony finally relenting on this with Rocket League as well as Fornite, the future seems bright for this.