After a life of nothing but work, no matter how much you love it at the time, you fill find yourself middle-aged and burnt out - and possibly regretting your entire career choice. This is coming from a person who was the class computer nerd, who ate, slept, and drank everything computer and software tech related for 25+ years.
I'm not saying tech is bad career choice - it isn't. But once you get burnt out at something, digging ditches out in the sunshine (or rain for that matter) looks much more appealing.