How many software developers do you know who say they don't "work" outside of the office, but then write code at home for personal projects? What is the definition of "work" then? What would happen if you start to let go of the concept of "work" as the bad thing, and expand the argument? I suggest we instead say using the same parts of your body and mind to the exclusion of the other parts is what is bad for you. Kno…
Those I have seen to work on side projects almost every day acted similarly to people who worked long hours - eithet got burned after a while or their hourly productivity at work went down (they chatted and socialized more at work, we're more talkative during meetings, procrastinated and wasted time with play tasks instead of doing real task).