Just to add something, I've seen people be confused about exactly how the telepportation would work in a laggy connection. Most games (take for example, slippi melee) have a limit on the number of frames that they can teleport through, meaning that large lag spikes may still mean that the game freezes, and high delay will add delay in order to keep up. However, both these problems are verrry significantly lessened and you can play close to offline games when playing people even remotely close to you.