To put it in context: Cascades is popular because it magically takes the same amount of time (~3 hours), has no traffic, costs less than a tank of gas, and puts you into downtown seattle without having to park and potentially have your car stolen.

That is to say.. people will take trains as long as they're truthfully better. We should work on making them better. Even the lovely people of Portland, as concerned as we are about the environment, don't take the train out of the goodness of their hearts.