Personal productivity measures how dispensible you’ve become.
See alienation.
Capitalism’s misalignment with humans is a huge productivity loss.
Long story short: Capitalism intrinsically and obviously - for almost every working class person experiencing it every day - does not align our work with our intrinsic motivations.
On a personal note: If I work on something I am uninterested in / I don’t see the immediate purpose of, my productivity is laughably low, it turns into mostly procrastination.
On the contrary, when I just go with the flow of what I feel like doing in the moment, I am unstoppable. This is specific to my circumstances, as what I feel like doing (if I am well rested and fed and temperature is right and - big and - my addictions are supressed) aligns very much with my terminal goals. To an extreme, that if there are multiple things I could be working on that lead to my terminal goals, then if I pick one that I am less in the mood for over another, say for some arbitrary internal constraint I set myself, then it will end up in procrastination all the same.
