> I have been thinking this for quite a while now, electric planes will kill a lot of rail routes

Why? If you have an existing rail network, trains are bound to be cheaper than planes and can get to more places (including convenient centrally-located stations in most major metro areas).

Plus, air travel is generally miserable unless you have a private / chartered plane. Crowds, long lines, security screenings, opaque and abusive pricing models, etc. This is not something we couldn't fix, but over the past 30 years, it's gotten a lot worse, not better; electric planes don't automatically change that. In contrast, rail travel in Europe is almost universally pleasant and hassle-free.