Developers and publishers are speaking out against Sony’s lack of cross-platform support, despite what Sony has publicly stated about the process.
Earlier this month, War Thunder and the new CEO of Hi-Rez, Stewart Chisam, asked Sony publicly to include cross-play support in their games through posts on Twitter.
Shortly after, in an interview with Game Informer, Sony Interactive Entertainment Worldwide Studios chairman and former SIE president and CEO, Shawn Layden, said that Sony was open to cross-play but that publishers and developers just needed to take the necessary steps to get there.
Source: IGN.com Devs, Publishers Upset Over Lack of PS4 Cross-Play Support