I wonder how many people can code but for whom coding is neither a major part of their work, nor a significant hobby?

My brother is training to be an oncologist. But he did a computer programming elective as an undergraduate and wrote some Python programs, and I believe got a decent grade too (need to maintain GPA). That was years ago, but if he felt the need or motivation he could dust it off. I’m sure he’s got the brains to learn more of it if he wanted to, but between a young family and a very demanding training program, I understand why in his limited recreation time he’d rather read a sci-fi novel than muck around with computers. But when his kids are older and he’s more established in his career, he’ll have more time-if he fees the itch.

I joked with him recently that there is nothing stopping someone with his career from doing a bit of mine as a hobby, but the reverse is not true: “hobby oncologist” sounds rather disturbing.