That answers the first question, "Wouldn't applying high taxes also be 'micromanaging'?" For the second question "And why do you think the market, guided by ta

That answers the first question, "Wouldn't applying high taxes also be 'micromanaging'?" For the second question "And why do you think the market, guided by tax changes or not, should decide on how long we keep building combustion engine cars?" I would say because the market under a fossil-fuel tax will do a better job at optimizing for what ought to be the desired ultimate goal of fewer fossil-fuel emissions overall instead of simply meeting what is an unnecessary side-goal of no fossil-fuel-burning cars. For the third question, "If the market wanted to keep them around for a hundred years, until the oil runs out, would that be ok, given what we know about how damaging the emissions from cars are?", I would say a large-enough fossil-fuel tax would cause humans to not use up the remaining oil as fast as these other schemes.