I think the mistake that people make with DRY is that they apply it at the textual level. They think that if they see the same particular sequence of characters in multiple places that they've violated the principle and need to refactor.

I rather see it at the behavioural level. Important domain logic ought to have a single implementation to avoid discrepencies that can put the system in an inconsistent state. For example your e-commerce platform really ought to just have one way of calculating the total cost of an order.

But, if you've copy pasted the boilerplate code that sets up your logging subsystem in a dozen different places, who cares?