I played the first STALKER at uni as well and loved it. Along with Red Orchestra that a mate was a play tester for.

All games paled in comparison to how much time I sunk into WoW between 2006 and 2011 though.

I think the real concern should be that they'll make it really easy to get on board with, until almost nobody is creating accounts directly with federated instances. Once they have enough penetration, they'll defederate and force people to choose; them or the Fediverse.