Maybe this works for some people, but to me it looks like a great way to make life as soulless as work. It also looks like it falls into the same trap of object

Maybe this works for some people, but to me it looks like a great way to make life as soulless as work. It also looks like it falls into the same trap of objectives set to lead to preconceived key results. From the blog's example, it looks like they wanted to read more and create some open source projects so you find an objective that fits those key results, not the other way around. I say this because reading 20 books and creating 2 open source projects are very narrow ways of "boosting knowledge." There are lots of ways to boost knowledge, and there are many different kinds of knowledge. Volunteering in a soup kitchen, as a tired example, is a great way to boost your knowledge of the world outside of your bubble and how other people live. Creating 2 open source projects is a great way to thicken the walls of your bubble. Here's a KR I'd suggest instead to boost knowledge: find a way to do outdoor manual labor twice a week, whatever it is. That will boost your knowledge of something, certainly. But to each their own, whatever makes you happy. I just know this would make me miserable. These key results look like a way to make your personal life just more training for your work life.