As an R&D engineer my grandfather used to say that if you're working on something new everyday for 20 years that's a lot of experience. But if you're working a

As an R&D engineer my grandfather used to say that if you're working on something new everyday for 20 years that's a lot of experience. But if you're working a job you can master in a year, is it actually 20 years of experience, or 1 year of experience 20 times? I'm not saying you're wrong - just implementing code at work by itself isn't deliberate practice - but I think it can be if you work just outside your comfort zone. Personally, I find work incredibly dull when I'm not learning something new.