JimFlat6:

Consider that Teslas do not look remarkable or ostentatious in anyway, that in itself is appealing to many purchasers. It has no social stigmas attached to it or notions of high priced servicing, while Porsche does with some people. I can't see that many Tesla buyers switching to Porsche just because it is a Porsche. 

That was not the case with the droves that switched to or entered the Porsche brand with the Cayenne or  Macan for instance which I know is a lower price point but still not cheap. 52% of all UK Porsche sales are Macans.