The Tesla owners I know are all happy with their Teslas.
> whether he's just been lucky
Being successful once might be luck. Being successful twice looks like business acumen. Being successful 3 times is business genius.
Bill Gates was successful 3 times, so was Steve Jobs.
Being successful in three unrelated industries: paypal, rockets and cars, is very very unusual. The number of successful new car manufacturers from scratch in the last 100 years or so is about zero (Delorean, Tucker, Bricklin, etc.) which makes Tesla all the more impressive.
> Now he's waded into one of the most difficult lines of business
Harder than car manufacturing or making rockets? Twitter is nothing compared to that.