Xbox, PSN and steam accounts at this point have decades of saves and purchases tied to them. Some of these games are delisted and are not readily available elsewhere.
If either platform decided to throw in the towel that would represent a huge lose to a large number of people.
Meh, I'm happy to have all external links in one place.
Once the community adapts that is where everyone will look as second nature if they want to check their website, social media, or whatever.