It is just called Continuing Legal Education. You can go to lectures, you can even listen to tapes on airplanes - they want you to stay current. So you do have to stay current to maintain your license even if you are not practicing. ↗
What exactly is it that humans do that is specifically human? There has to be something. How odd it is for billions of people to be alive, yet not one of them is really quite sure of what makes people people. ↗