It taking place in Europe for flights 500 miles or less with a focus on using electrify rail system today and more in the coming years. UK and Europe are heavily investing in HSR from 220-350km lines and converting non electrify lines to electrify with a speed of 160km up to 200km where possible. They are reactivating lines that have not seen passenger trains for over 50 years with some being DMU or battery power,
Dealing with mountains on the west coast is not easy or cheap to do it for any type of line.
Texas is a Red State for any type of rail as well willing to pay for it. Ask Austin about their attempts to to get an LRT built there let along DMU Commuter Lines.