Well Tesla also relies on government subsidies as well a loan (which it paid back early, as did Ford). Also Ford is more than a 100 years old, so it's bound to have a bad period. We'll have to see what happens when tech companies are that old ( or will they even survive)
I don't trust the government to manipulate the free market efficiently. It's comprised of hapless morons who don't know what they're doing and whose favor is for sale to the highest bidder. Case in point are the tremendous number of bankrupt alternative energy companies built upon favorable treatment by the government. Market intervention doesn't suddenly become justifiable simply because the outcome of advancing the sustainability agenda is positive.
More electric vehicles will get on the road when there is a realistic economic rationale to buy them. Without the subsidy, an $80,000 car that can only go 200 miles is a lot less appealing.