Interesting post! I posted one not long ago saying the opposite. The reactions were staggering and felt the need to update my post to clarify my point. Regarding your post though, i think that no one is assuming extremes - you can easily manage a few hours a month to do some mad science experiments. You might even surprise yourself with the outcome or renew your passion that made you take up development in the first…
Example: I probably need to sit down and actually practice, over and over again, certain Regex concepts, because I need them at hand immediately.... which is what habit does.