Additionally there's the problem of airport expansion. There aren't a lot of palatable options as filling in the bay is (rightfully) a non-starter for most people. High speed rail wouldn't replace air travel but it would complement it (especially with the related regional improvements like electrifying Caltrain).
I've already invested into making flying comfortable. Lounge-access credit cards, Global Entry (which grants TSA Pre-check), upgrade-giving status, et cetera. I'd need trip time or cost cut in half relative to air travel to make switching worth it.
I'm not the median consumer. But weighted by likely usage, I'm closer to the average.
Anecdotally: people where I work do a lot of traveling between our NYC and DC offices. Only one person flies rather than taking Amtrak...
Train is easy, consistent and comfortable. Always power, Wi-Fi and cell signal too.
Fair enough. I'm an infrequent NYC-DC commuter. And my preferred mode to JFK from the city is via the LIRR, a rail route. It takes longer, most of the time, but less time on average. Most importantly: it's consistent.
* How often you travel
* How much you will be able to take advantage of perks
* How close you are to various terminals/airports
* How far you regularly need to go
* How you like to travel (fast & cramped, slow & spacious)
etc.