short flights might go electric high-speed rail works perfectly (though there's an obvious chicken and egg problem, because setting up a new airport is relativ

short flights might go electric high-speed rail works perfectly (though there's an obvious chicken and egg problem, because setting up a new airport is relatively trivial compared to building HSR connections between points of interest, but networks effects do matter, if there's an already good network it makes sense to connect new cities) and for long haul flights the convenience will still make a lot of people pay for it. plus, if society wants to subsidize it, we could. (like the US already does for certain routes.)