"Dogfooding" is the tech industry variant of a much older principle. The original expression "Eating your own dogfood" goes back further having been adopted, and shortened into "dogfooding". While its easy to see it implying a second class "dogfood" that the end users have to put up with, it actually stems from the opposite, that the product is good enough they feed it to their own dogs, or in one telling, willingly eat it themselves as a human. https://en.wikipedia.org/wiki/Eating_your_own_dog_food