It was recently revealed that despite PC, Switch, and Xbox One all allowing cross-platform multiplayer for various games, Sony wasn’t going to follow suit because they couldn’t guarantee a safe online environment with people on other platforms.
It’s an odd excuse, because Sony can’t even guarantee a safe online environment for their own platform, and people pointed out that Nintendo was on board with cross-platform play, and who is more careful about that sort of stuff than Nintendo? So if Nintendo could allow for it, why on earth couldn’t Sony? They’re turning their unwillingness to collaborate towards a more gamer-friendly atmosphere into “Won’t somebody think of the children?!?”
Xbox’s Phil Spencer weighed-in on the topic, and he’s not happy about Sony’s implication that Xbox One doesn’t do as good of a job to project the online safety of their players:
“The fact that somebody would make an assertion that somehow we’re not keeping Minecraft players safe… I found, not only from a Microsoft but from a game industry perspective, I don’t know why that has to become the dialogue. That doesn’t seem healthy for anyone.”

“I found the whole discussion around safety with our game and that somehow we wouldn’t take that as a top priority… Frankly through our parental controls on Xbox Live and everything else that we’ve done shown that that’s incredibly important to us as a platform. And Nintendo…! The doors open. I’d love all Minecraft players to have the full Minecraft experience. We take the safety of Xbox Live, the players across all of our games… It’s incredibly important to our team.”
Rocket League’s publisher also had something to add to the discussion:

“I understand that stance. We want to take care of our players. But from our perspective, if PlayStation already allows cross-network with PC, which is the least regulated of any of the partners, then in theory, having Xbox and Switch in there should be fine. They’re a lot more regulated. From our perspective that concern is already handled. That’s taken care of.” – Jeremy Dunham
Imagine a future, not too far from now, where you can play games against your buddies, no matter which platform they’re playing on. You don’t have to settle for the same console as whoever picks up their console first in a group of friends, it won’t matter anymore. Certainly publishers and hardware companies are working towards that, but others (Looking at you, Sony) continue to resist. Sony has said the topic isn’t closed for discussion, and they’re not saying it’s a no forever, but that there are no immediate plans to give the people what they want.