Using your argument: Mcdonalds, Starbucks, Walmart, Coke and many other companies are O(N^2) solutions and therefore failures. They repackaged an existing idea

Using your argument: Mcdonalds, Starbucks, Walmart, Coke and many other companies are O(N^2) solutions and therefore failures. They repackaged an existing idea, made slight modifications, and sold it for lots of money. I hate seeing wasted money and stupid solutions succeed like the next guy and maybe we're talking about different things. But whether things got done should be decided by the customer not your TDD fanatic coworker.