I’m not from the area but does anyone actually fly from SEA to PDX assuming they have a car? It’s not like SeaTac is even that close to Seattle. And depending on where you live and destination plans it’s hard for me to imagine trading a less than 3 hour drive for a train trip.

I can't relate to this at all. I would trade driving for a train trip if the total duration is somewhat comparable (or even a little bit longer), especially if I would have to make the trip regularly.

I don't think flying is convenient but taking a HSR-train is.

It depends on a lot of factors. Where do you live relative to the train station? How annoying is the drive? Do you want/need a car on the other end? New York checks two of those boxes for me. (Getting to the train is out of the way.) But a lot of places that could be train trips I’d want a car once I got there.

From the number of flights offered, I think it’s much more common than you might think. My guess is that part of the reason has to to with Seattle’s very very bad traffic. I once spent 4 hours traveling less than 15 miles on a drive heading south from the city center, and I don’t think that’s even super anomalous.

One of these days people are going to understand that "what makes most ecological sense" is allowing people to live their normal lives as they're accustomed to live them, without beating them over the head and telling them they're bad people.

The average American lifestyle (cars included) is what it is . . . so decarbonize that and stop expecting everyone to live like Brooklynites or Europeans.