My 2c as a game dev is that you really want to know the cases where you
need real-time collaboration. Otherwise the still collaborative but slower updating techniques people normally use are perfectly fine. Even in something like an MMO parts of the game will use real-time game servers and others might just use a REST API.
The other side of it is to make sure that real-time collab is something users actually want and use. There’s a lot of froth at the moment about real-time but IMO and IME it has a much smaller set of useful cases than most people actually think. But where it is useful, it is a step up for collaboration.
For example with Google Docs I find myself and our broader team mostly solo write but collaboratively review and edit. Where we collaboratively write its carefully structured so people aren’t stomping on each other and often done with someone acting as a mediator.