I'm surprised at this sentiment. The other major auto makers have had at least 5 years now to show what they can do in regards to developing EVs and the results

I'm surprised at this sentiment. The other major auto makers have had at least 5 years now to show what they can do in regards to developing EVs and the results are not good. Nissan's leaf is a solid car but with the recent departure of Ghosn the future is in doubt. Many of the American auto makers are still focused on squeezing as much as they can from SUVs and don't inspire confidence that they will be able to produce a quality vehicle to threaten Tesla's potential customer base. The limited (read luxury) SKUs, word of mouth, and differentiated software give Tesla a distinct advantage over traditional autos. In the past it was viable to worry about execution but with the new gigafactory and China expansion underway , coupled with recent sales figures it's difficult to bet against them.