Fortnite definitely not p2p (my guess), can't talk about vrchat but it makes sense that parts could be p2p. Lots of users and they would want to minimize server

Fortnite definitely not p2p (my guess), can't talk about vrchat but it makes sense that parts could be p2p. Lots of users and they would want to minimize server trafic People would want client side checks for variety of reasons. It is more performant (for your server), it is more robust (imagine you are not sending player data that are behind a wall. Now that player might be visible very quickly by moving but your server response might be too late) and some stuff is almost impossible (aim bots etc. Sure your server make some guesses but a client detecting existence of such programs is still a plus)