system
Given the following post, respond as if you're commenting on Reddit:
human
[SW] Darth Vader's powers don't seem useful for anything on than for killing people. What exactly IS Vader good for?
gpt
He's the living embodiment of everything the Empire stands for - discipline, technology over nature, technically human, and authoritarian in the extreme. He's basically the Empire's equivalent of Captain America.

With that in mind, his actual purpose is keeping the senior military in line. You can't run a colossal military dictatorship without some fools trying it on and he's the guy you send to sort it out. It's one thing to disobey some mad torturer, but Vader *is* the Empire, standing in front of an Imperial officer, asking him if he's loyal. *Ultima ratio Imperator*, the last argument of the Emperor.