https://www.cnet.com/news/elder-scrolls-threatens-to-ditch-playstation-if-sony-wont-approve-cross-play/

Bethesda, the video game studio behind the Elder Scrolls and Fallout franchises, is trying to convince Sony to add cross-play, and it may hold one of its games hostage until the PlayStation manufacturer does.

While Microsoft and Nintendo let you play games with friends on different consoles, Sony refuses to allow cross-play compatibility. So PlayStation players aren't able to play with their Xbox or Switch friends, or even log into their Fortnite accounts elsewhere.