Staying hands-on is pretty difficult in other industries. A good friend of mine is a research scientist. She loves what she does and is good at it and wants to go on doing it. But now she as been offered two choices, she can go for a Fellowship and spend her time writing grant proposals and mentoring students or... Well, no-one really talks about option B. And no-one who's taken option B is around the lab to ask.

Same in banking, you might be able to stay a trader, if you're good. You couldn't stay an analyst, it's up or out. Or in engineering, you don't get to actually design machinery or chips or whatever for long, again, up or out, gotta make room for the fresh intake of graduates.

This might not be the best way to work, but it's the norm, and a programmer who really can stay hands-on their whole career is fortunate indeed. My own strategy in this area is to stay hands-on but do less work directly, spend my time automating common tasks and developing tools to make junior members of my team more productive. We'll have to see how that plays out...