[jajko]

A lot of devs love climbing. Problem solving is part of it, especially if you climb a route for the first time. Very different area but similar approaches need to be deployed to succeed.

Plus its properly great and fulfilling activity that very few sports can deliver (IMHO), not requiring massive investment or some ridiculously long and difficult trips to just get to it (gyms, if you want to climb in Patagonia or Antarctic then its a different game altogether).