As long as there isn't massive increase in taxation I don't think ICEs will be hard to sell. There is plenty of people who don't want to deal with charging it for example. Or like the long range.
Unless we end up with refinery bottlenecks (like we more or less have now) or political incentives (although the odds of that seem alarmingly low at this point).
> The consumption would be lower so price would be too.
Is this expected to hold as oil usage drops over the next century?
My point is that there is relationship with price and consumption. If the price rises too much people will either look for alternatives or reduce use. Thus prices might not rise that much.