@agressivelyPassive if you routinely call indirections abstractions, then 'premature abstraction is the root of all evil' holds. If you separate the two concepts, you might think differently.

If my team's codebase had a business logic class that had a concrete dependency on an EntityBuilderFactory, I'd vomit a little, but I wouldn't delete it (can't piss off too many people all the time). But I would route around the damage by allowing the class to depend on the EBF *or* something else.