Even the first case isn’t often that nice, because it’s only a fraction of the time that you’re not busy. For example I went to work by local train for a while

Even the first case isn’t often that nice, because it’s only a fraction of the time that you’re not busy. For example I went to work by local train for a while, but in practice it was a 10 minutes walk, a 5 minutes wait, a 5 minutes ride, a 10 minutes wait, a 20 minutes ride, then a 10 minutes walk. So in 1 hour there was only 20 minutes “free”.