Right. Having the client handle everything only after receiving events / data from server works great for a long time till one comes against the real-time multi

Right. Having the client handle everything only after receiving events / data from server works great for a long time till one comes against the real-time multiplayer games. Without doing some lerping on the client side the client is always going to run a few ticks behind the server. There are far too many variables to say that server side calculation is the only real way to program.