well? what is your opinion, more or less?
You make a living as a programmer, how many hours a week do you spend learning new things?
You are presenting the 10 to 20 hours a week as if someone else told you a common truth. Which is what I am disagreeing with. Instead why don't you tell us how much time you put in, than I wouldn't have anything to disagree with.
I know that I don't have an extra 10 to 20 hours a week to do anything, let alone learn new things.