Also started (paid office work) at 15. In 95. And I'm still obsessed with never forgetting anything. Long after the dopamine of solving a problem and moving on to the next, you go back and look at code and think: This was genius. How does this even work? How did I come up with it and how was my brain working? Much of my old code looks like brainfuck to me. Whenever I don't have anything better to do I pry it open and learn how it worked again. Then suddenly I grasp it and know I'm still good.

I never did it for anything other than solving puzzles for fun, and because being a musician doesn't pay the bills. But the joy of code and music are both more about keeping your brain in shape than anything else.