> McDonald's claimed that the reason for serving such hot coffee in its drive-through windows was that those who purchased the coffee typically were commuters who wanted to drive a distance with the coffee; the high initial temperature would keep the coffee hot during the trip.[12] However, it came to light that McDonald's had carried out research finding that customers intend to consume the coffee immediately while driving.[22]
The [22] source doesn't say anything about that research. But a commuter is a very specific customer and hardly represents all customers.
Further, I'm guessing but doubt that commuters wouldn't go to mcd just for coffee, whatever breakfast(?) maybe didn't last long enough for it to cool down. Sure, but that all depends.
And apparently, commuters didn't mind enough to find something else.
Part from safety issues I haven't really seen any convincing argument against "too hot" coffee.
