It's definitely worth reminding anyone that this is why you need train stations to have good bus service to the surrounding area. You can't even take a commuter rail (in a city with decent rail transit) unless your destination has good bus service or a friend to pick you up.

These things come hand in hand, if you want to make it work things either need to be walking distance from the station or with reasonably frequent buses. If a bus comes once an hour (actually the case in my city off rush-hour) it may as well not exist.