I agree with all of this but one thing I would add is that the process in processed cheese allows them to go as light as they want with the real cheese, I’m sure some government regulation has a minimum but the core point is that not all American cheese is the same, if you want the good stuff you have to go to the deli and get it sliced (yeah they do that) it’s much more cheesy and almost cheddar tasting than Kraft but it melts like American and is perfect for any sauce.