The quality has a cost. Perfect solutions are not cheap, rather they are expensive. You can still create 4 times value with the same effort with 80 / 20 Pareto Principle when your customer is not perfectionist.
The Standish Group ranks the usage factor of features across the average enterprise software system. Their findings show that on average only 7 percent of an enterprise application features are “always” used, 13 percent of the features are “often” used, and 16 percent are used “occasionally.” That leaves 64 percent of the features in an average enterprise application as either “rarely” or “never” used.