system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's the point of concept cars that are made but never sold to the public?
gpt
Concept cars are a good way for automobile manufactures to "test the waters" with new vehicle designs and technologies. They can show the concepts at Auto shows and get useful feedback from critics and the general public. This helps them to guide their future designs, and focus on the the things that got the most positive feedback, while fixing things people didn't like so much.

Also, it's a good way to show off some of the cool shit their company has been working on :)