I keep reading about fixing your time step to help improve synchronization when dealing with movement and such (i.e. velocities) across a multiplayer game. I notice that most people seem to pick something like 60Hz as their fixed time step. What happens though if you have a client that cannot physically run that fast, such as an old laptop that can only manage to run at 28Hz for example?
Would you just run as fast as possible in this case with the delta time taking care of things in equations? Isn't this just the same then as variable time step? Therefore is it really "fixed time step as long as the client can attain it, otherwise variable time step?"