Less Memorization - More Reaction? (Trials/Raids/Bosses)

[Sove92]

The prediction is used for other players on your screen. There is no reason to predict your movements since the information required to determine that is already at your client - from your keyboard.

If you have massive lag, you will notice that you can still run around (of course the server isn't getting the information), when the lag cease and the server catches up, it just takes the client's word as to where you are. Others will see you rubberband but your own rubberbanding isn't visible from your side - you will see others rubberband though.

And the server blindly trusting the client with no checks made at all is what allows poshacking. SE doesn't even need to make it strict, they only need to have a simple plausisiblity check there. Your client sends the position updates to server, you are already seeing yourself move, server checks if this movement makes sense, if yes, nothing extraordinary happens, if the answer is no (will only happen if you are lagging hard or poshacking), your position is changed by the server. The client never needs to wait for a server response to start moving your character.

"The prediction is used for other players on your screen.": For mobs too and SE is doing a bad job with it, try hitting a moving enemy with melee and you see what I mean.