I like the focus on having a solid, measurable, _objective_ benchmark. Everyone knows that it takes hundreds of hours to get very good at something, but this es

I like the focus on having a solid, measurable, _objective_ benchmark. Everyone knows that it takes hundreds of hours to get very good at something, but this essay is a great reminder that simply putting hundreds of hours of practice is still no guarantee of progress if you do not have a way to measure it.