And we can probably also point to some "commuter trains" that have intercity-ish characteristics.Of course, technically Amtrak doesn't run commuter trains, but the Keystones, Hiawathas, Capitol Corridor and Pacific Surfliners all come awfully close to being commuter operations.
If we insist on categorizing each train it would seem useful to add a third, middle category (regional, perhaps?). Or just recognize that not everything falls neatly into either commuter or intercity.