I think it also depends on how you travel. I have a 4 hour commute each day but it is on the train. I'm lucky enough to be at the first stop each way so I typic

I think it also depends on how you travel. I have a 4 hour commute each day but it is on the train. I'm lucky enough to be at the first stop each way so I typically get a seat and the train is typically empty enough so I get a seat to myself. Because of that I'm able to plop my 15" laptop on my and go to town. When I fly it is more of an issue because of the limited space, so I definitely understand why a 13" becomes a better option.