I think the answer to that is what would Canadians do, and I think Ontario provided a good example. When the Ford government rescinded the subsidies, electric vehicle sales fell 45%. That's what happens.
If those vehicles are sitting on lots, then I suppose at some point they may or may not sell, depending on how interested people are in purchasing them at their real cost.
The reality, though, is that if there weren't incentives in place, probably.... It's not the manufacturers, but the dealers, who will order and sell what customers want to buy.