Why the netcode issue exists, and why it cannot be fixed.

[Astarica]

When you hit spacebar (or whatever you mapped jump to) your character immediately jumps. If it was controlled by the server you would lag between when hit you space bar and when you jump. There's nothing unusual with the way your client renders any of the information. The only thing unusual about this game is that server gets to call all shots. Otherwise, the speed of light travels 3000km in 0.01s, which is greater than the distance from west coast to east coast. So let's say all other MMORPG are processed by infinitely powerful computers on both end, so that the only limiting factor is the speed of light. Your server is still going to lag behind the client by 0.01s and we treat it as if the server just polls data every 0.01s (because faster than that has no use due to speed of light being not fast enough) compared to FF14's 0.3s. This means we should encounter the same problems in other MMORPG about 3% of the time compared to FF14.

But there's no way this is true. That'd mean we'd have cases where you pop an invulnerability ability (say, Ice Block), have its CD charged, and still die. Can you imagine the amount of crying in a PvP forum if there's even a slightly chance that you use your 'save self' ability only to see it not only not work, but you're charged the CD for using it? So the only conclusion is that other games do not use the same kind of design.

While superficially having server take control of everything is safer, it's not like you hear WoW or any other MMORPG getting hacked every day, so clearly it is not that important, either.