As I recall from my days working and living in and near DC, a lot more people commuted from Baltimore to DC than the other direction due largely to lower housing costs in Baltimore. Yes, it would be a pain, but some find their time on the MARC train relaxing (depending on the exact hour, and the commute time still doesn't compare with that for people who commute by car from, say, Fredericksburg, or by train from Harper's Ferry. When I lived in Silver Spring, it took me about an hour to commute to my job in DC, by a combination or walking (and sometimes commuter bus) and Metro rail. I recall hearing of people who bragged about their short drive time to work in DC from points such as Warrenton, but then learned they left home by 5:30 a.m.

Georgetown, of course, did not want a Metro station. Taking a bus, or a combination of walking and Metro trail (from George Washington Univresity/Foggy Bottom station), to Union Station and MARC train from there to Baltimore, and then maybe bus or light rail to get to your job, sounds like a long commute. But you'd save on housing costs and would be living in Georgetown, which I certinly was never able to afford.