PlayStation 4 finally allows Switch and Xbox cross-play with new Fortnite beta
https://thenextweb.com/gaming/2018/09/26/playstation-xbox-nintendo-cross-play-fortnite/
After months of continuous pressure and needling and guilting from the rest of the gaming industry — fans, developers, and even Microsoft and Nintendo themselves — Sony is finally allowing cross-platform play between the PlayStation 4 and the Xbox One and Switch.
— PlayStation (@PlayStation) September 26, 2018