Maybe that's why AmCoffee usually tastes so bad! They probably start with not-hot-enough water, probably use too little coffee grounds (resulting in overextraction and a bitter taste), and then probably leave it on the burner for hours (sizzling, charring, and otherwise burning the coffee).
Getting hot water isn't usually too much of a problem, however I've seen comments from a few of our British members who don't think that Amtrak's water is hot enough to brew a proper pot of tea.
Well IIRC, the issue was that to do a proper pot of tea, the water needs to be boiling just prior to one's inserting the tea bag. You won't get that on Amtrak most likely. On the other hand, boiling water for coffee prior to pouring it over the grounds, is not a good thing. IIRC, I believe that the ideal temp for coffee is around 180 or 190, which is below the boiling point.