Or to come into a city for an evening event. I'm actually quite close to commuter rail to the 40 mile away large city. Which I take if I'm going in 9-5 but it's completely impractical to use for going in for dinner and a show.
Trains would allow kids, elderly, people without a driver's license or the financial means to afford a car to participate in society as well.
That meant while I could take the train to downtown, it wasn't practical (at least for a night of bar hopping) unless I wanted to spend a hefty sum on a return Uber at the end of the night.