Mark writes:

You must read up on bullet trains.

Electric trains are different from electric airplanes, because the source of
power is not being carried with the vehicle in an electric train. You can have
a massive, fixed power plant producing electricity for the train, and all the
train needs is some transformers and motors. That option doesn't exist with
aircraft, which must carry the entire power plant aboard. Worse yet, aircraft
are much more sensitive to weight than trains.