Why? We all know we need to keep learning and keep doing things even outside of work. Every time I solve a non trivial problem, I blog about it, mostly for me so I can remember in the future but also so others can see how I think, how I code etc. I don’t buy it that any serious developer cannot find a few hours here and there to do something like this especially when it helps with getting better jobs with better conditions and much better salary. It’s totally worth it.