Good Enough isn't mediocre, it's good (enough).
If you're selling to NASA, Good Enough might mean you machine it to the thousandth of the inch, with the best possible materials.
If you're selling to Joe Schmoe, Good Enough might mean you machine it to the tenth of the inch, with materials purchased to trade off quality and price.
And both of those products might be just what their respective markets want, once you look at availability, price, etc.
Good Enough is Good Enough.
edit: Besides, has anybody ever seen a product where engineering didn't list ways to make it better, if given more time and money?
