IIRC there was an ad involving a dog food manufacturer feeding their own dogs the food they made. "Dogfooding" then became synonymous with using your own product.
I always thought it was intentionally derogatory in order to make the listener really think hard about what they’re outputting.
I.e. what you’re making is bad. It’s going to be bad. Force yourself to use it until you understand why it’s so bad, so that it’ll be as not bad as it can possibly be for the people you’re offering it to.
