And that's great! But there's a reason I used qualifiers like "most", not "all".
If you bill by the hour, there's a reasonable (but not necessarily correct or optimal) case to be made for measuring your productivity in terms of billable hours.
But it makes zero sense to do so if your hours are disconnected from the economic activity that results from your work. In such cases, it would be completely arbitrary to measure hours and call that a measure of productivity. Just as arbitrary as lines of code.
