In many ways I agree with that analysis. However, I also want to point out that just like Google in the case of Apple, Samsung (and possibly other big players) could develop to be a serious competition to Tesla.
So maybe we in this forum are also way too focused on the "traditional" competition when we should watch out for Tata, Hyundai & Co. Frankly, I don't see the big three or the Germans do anything relevant in the coming years.
I think the fact that BMW focused on EV and has build the i3 and i8 from the ground up, and they still are no comparison to Tesla shows that its a very long way for the other companies to catch up.
The Tesla Investors shouldn't care to much about marketshare. Profitmargin is the key here.
Its like Android vs iOS, Android catched up and surpassed iOS in marketshare but still Apple is having and will have a much higher profit margin.
The majority of worldwide car sales are comparable to a commodity (people will choose the kind of car the want primarily on price basis) are based on almost 0 profit margin and the business model is to make a profit from service and carparts.
So Im confident that Teslas overall marketshare of all carsales per year will never be significant. But I can Imagine that Tesla will be the most profitable car manufacturer in the world (highest market cap)