Sure, but it's almost absurd to argue that Musk is the only billionaire alive whose work is a net positive on society.
No. But he’s a better bet than many. Including network effects, his work has added value, if only by accelerating retroactively obvious ideas.
Certainly in the UK it's a minor player compared with the Nissan Leaf, and plugin hybrids are even more popular
With regards to Hybrids, my (limited) understanding is that they are part of the problem - they're better, but only better by half. From what I'm reading about global warming, we need to push as far as possible towards a fully electric, mostly renewable future as quick as possible.