I would have taken it more seriously if he addressed security and unit tests. His perspective here is sophomore. He is right, but not because of what he wrote. DRY isn't just about abstractions, it's about the cost of writing new code. And testing and security verification are hidden costs to duplicated code.
I understand that it was a bit blunt, but isn't referring to a perspective as 'sophomore' just another way of saying it was short sighted or that it doesn't take the broader ramifications into account?
