How has Elon Musk managed to remain top dog in the EV market?

When Tesla was set-up there was much scepticism about the hopes and aspirations of the company. Elon Musk was effectively forced to take on the whole business after a major management shake-up and look at the progress to date!

However, in the cut throat industry of autos, how has Elon Musk managed to remain top dog in the sector?