Modern Software Over-Engineering Mistakes
He missed at least one: functions should be "small" and broken up for "testability."No, functions should perform one task and perform it well. Not every conditional test inside the function needs to be its own function and have its own unit test. Sometimes a function that does just one thing and one thing well has more than one step to do that thing, and those steps don't necessarily belong in their own functions. Testability and composability are important, but that has to be balanced against locality of reference and context. When I see a colleague write in a code review that pieces of a function should be factored out of a larger function "just in case they'll be reused" I step on it hard. This is related to "over generalization" but not exactly the same.