More or less. Technology transitions have reinforcing feedback loops - once the transition starts, the bottom falls out of the market for used ICE cars (the junk value and a dollar thing..) which makes new ICE cars very difficult indeed to sell. After a couple years of that, gasoline is no longer sold in nearly as many places...

It's not blind optimism - look, the oil barons currently bribing the US congress (and various european politicians..) fall into two categories; "Marginal producers" and "Funny looking/weirdly dressed foreigners". That means that once the price of oil falls to any significant extent, the political lobby for oil rapidly gets reduced to 90+% "Guys in turbans with no vote". That is an interest group which politicians will loose absolutely no sleep over burning all bridges with. So there shouldn't be any pressure from the top to keep the ICE alive artificially. That will cost revenue, yes, but it will save consumers lots of money. Which they will spend. And that will create revenue, and reduce expeditures, and again.. Being the politician that steps up and says "I know you just saved thousands of dollars that were heading down to the kingdom of sand, but I just cant stand to see a commoner with money so I'm going to slap a 3 thousand dollar surcharge on your electric bill" is a good way to end up on a literal pike. No matter how much economy speak you try to dress it up in.