I do this as well, at least when flying economy, because I want to spend as little time in that plane seat as possible. Overhead bin space has rarely been a pro

I do this as well, at least when flying economy, because I want to spend as little time in that plane seat as possible. Overhead bin space has rarely been a problem, so I take that risk. Maybe I've been lucky or maybe it's because my carryon is fairly small and soft (squashable!)