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>The risk of shifting from the 9-to-5 mindset to "getting things done" is that people will end up (and some already are) working 70/80 hours a week and die young of heart attack.

This is the scenario that worries me- a massive race to the bottom in order to get "ahead". Most jobs aren't that important, and don't merit that much of the employee's time. At an e-commerce place I used to work, I overheard a c-level exec tell a guy who was putting in lots of overtime, "Remember, we're not curing cancer here." I think it's great that the exec was encouraging the guy to not place too much importance on his job, but it's too bad that it was necessary in the first place.