At some point the effort we put into a task yields almost no value.
It is that seventh time we straighten out the table cloth. It is the re-reading of the re-editing of the re-reading of the text. It is putting on the final touches which takes double the time of the whole project.
Being fully aware of this: We can stop chasing the value and indulge in creasing every corner, exploring every edge, and getting lost in the fine details.
It has no value, but it allows for delightful discoveries.