I commute on a road bike every day, but not on a folder. I've noticed, however, that owners of folding bikes are all really obsessed (in a good way) about their bikes, and, to be honest, I don't really get the whole thing at all. How often do you actually encounter situations where you can't lock up somewhere and need to be able to fold your bike? Is it basically a specialty item for people who fly or take trains often? Sorry if this sounds like a stupid question, I know it must come off as extremely naive here, but I'm just curious!