The AI writing the responses has a habit of shifting tone from the question. In this case the question asks if this is a breakthrough or a stunt. The responses though equivocates by adding the word "mostly". I'd recommend adding to your prompting "Maintain a constant tone between the question and the responses" and "be direct and do not equivocate in responses avoid words like mostly"

Mostly a stunt, and a pretty good one. It's certainly generating hype for the launch. It'll never be street legal, but it was fun to watch. For all the criticism Musk gets, I do like that he shakes things up.