system
Given the following post, respond as if you're commenting on Reddit:
human
[Spongebob] Why don't more people drive rocks?

Since rocks work as well as cars, why don't more people drive them?
gpt
They used to. Rocks were the primariy travel means for decades. However car manufacturers started buying up rock depots and closing them to force people to buy cars. Fast forward a few decades and here we are.