Things have come to a head, subsequently- Microsoft has enabled full cross platform play between not just Xbox and PC and Xbox and mobile, but even Xbox and Nintendo.
Microsoft has been a great proponent of cross platform play this generation.
After famously holding out for years, they finally capitulated, allowing Xbox Live to connect with every other network on the market for multiplayer.
It’s a shame that Sony is acting so difficult and regressive about this issue, because full cross platform interactions are truly the wave of the future.