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Tesla certainly has demonstrated that it's possible to build a long-range general-use EV. This is a fact and should be respected.
At the same time there's no doubt it's a car in the luxury class that nowhere near the mass market availability.
Regarding prices, I certainly am in favour of electrification of everything (not just cars), and would switch to an EV as soon as it makes sense to me. There are physical and economical challenges to it though:
https://www.sciencedirect.com/science/article/pii/S0301421518302726