There is a rail line, but no passenger station. Realistically there would be 1 train per day max to the big city and you'd have to spend the night instead of making a day or half day trip. (I currently live in Durham and I can catch a morning train to Charlotte and back in the evening according to the schedule, as long as I can fit my business in between the arrival time of the morning train and the departure time of the evening train, and that is servicing two much larger populations.)

And that is just going to the nearest larger city... What if you want to go to a different city? Or a smaller town? Or a random place that doesn't have a bus station?

I predict very few people would participate.

For a data point on this, I'm in the Waterloo region, about an hour's drive into Toronto when traffic is good, or 2-2.5 hours when it's not. The government regional rail (GO Transit) operates four commuter trains into the city on weekday mornings, and four back again in the evening.

Despite being slow and expensive, those trains are packed, day after day, with commuters who would rather live out of the city, and not spend 15-20 hours of their week sitting in traffic on the 401. They recently extended two of the trains with additional carriages to handle the capacity.

We've been clamouring for hourly bidirectional service for over a decade and it's only in recent years that the relevant authorities have finally gotten their act together to build out the necessary infrastructure to make it possible (twinning a bunch of track sections, building a bypass for US-bound freight, and electrification).