SpaceX is cool. I think musk definitely draws excitement and his companies have great brand reputation. Tesla sells an idea, a lifestyle. When you look at the product, its not great. ill-thought out features (camera rain sensor, parking sensors being taken out), crappy materials, and promises that might never be delivered (self-driving).

I think musk really just is an optimist and a big thinker that is driving constantly towards the future, and people love that. Even if he accomplishes 10% of what he sets out to do, thats still a massive step forward.