I think about this in terms of longevity. If I am taking on a new project that I am not necessarily an expert in, I need small wins to keep that momentum going. I think this is what leads to people quitting projects prematurely. So I do think that excellence is a result of the compounding of good enoughs. If you refuse to settle for good enoughs, then you most likely will end up giving up on whatever it is you are working on.