It really is a good idea to keep learning new skills. Like you said there really is no excuse for not learning as there are lots of free courses out there. 

Personally I don't really have any interest in coding or learning how to code, but that doesnt mean I can't learn some other skills on web development, like building a steem store front or something along those lines. There is also the idea of just taking a new course and learning how to do something new, whether it be coding, photography, personal development etc. The most important thing is just getting out of our comfort zone. Just because we have finished our schooling doesnt mean we should stop learning