To play devils advocate: electric cars are a niche, Sure Tesla can sell out. The niche is large enough - for more players, but ultimately electric cars will top out at a small fraction of the total vehicle market.
Of course this is predicting the future. Nobody does that well. In a few years we will have facts, but that doesn't say much about the future beyond that.
Of course this is predicting the future. Nobody does that well. In a few years we will have facts, but that doesn't say much about the future beyond that.