system
Given the following post, respond as if you're commenting on Reddit:
human
[Staw Wars] What is the purpose of the second Death Star being larger than the first one?

The first Death Star was already strong enough to destroy a planet. Making a bigger one seems like it would use up more resources to build, keep running, and to move around.
gpt
The Death Star was a (super)weapon of terror. It was a slow, cumbersome logistical nightmare but it could blow up an entire planet in one shot. It's use was just as much psychological as it was physical. "Obey or we will literally one-shot your homeworld and kill you and everything you know."

Then the rebels blew it up and hailed it as this great victory over the Empire.

So the Empire just builds another one. Not only that, but it makes the next one much, much bigger. More guns, more shields, devoid of the original's weakness (or it would have been if finished). It's the ultimate show of force against anyone harboring anti-Imperial sentiment. "Blow up even our most powerful weapon and we'll just build another one. A better one. You can't stop us so it's pointless to try."