I can't imagine applying such a strict guideline without feeling I was being rather dogmatic. I may also have a higher tolerance than most for details coordinating, since I do that whole Ivy thing that's basically navy-and-burgundy garanimals.
Anyway, the problem with excellence is that you need a gold standard of excellence – and for me, there isn't one. There's a canon, there are traditions, but they are a shotgun, not a scalpel – I suppose if you're practicing a very limited, very pure aesthetic, you can speak with a great degree of certainty, but is anybody like that actually talking about clothes on the internet? I know I'm speaking some bastard dialectic that's sorta-darted-Ivy-American-Anglophile-Hong Kong tailors copying Italian suits, and I like having the freedom to pick and choose from within several different traditions in an informed way.