Super Old New technology

Soon a new car will come out which will be the fastest land vehicle ever invented. Not only will it go supersonic, but it is supposed to go almost up to mach 2. This new car would not only be a cool new innovation, but it would allow designers to see possible ways to make current cars more efficient and fast. I think that this is just ridiculous even though it is really cool. While I think that it is neat I do not think that it is practical for everyone to drive around in hyper aero-dynamic race cars. And aside from setting the world record, it seems rather useless. It is kind of like being able to spit watermelon seeds the farthest. While cool, it is not so practical. If I was to die today, I would want my legacy to live on as being slightly more important then helping to make a really fast car, but that is just my opinion