Paracetamol and caffeine is a common combination in Europe too. I wouldn't be inclined to move countries or even to bring home medication from abroad just so I could take my medication as a single pill instead of two.
Of course moving for such generic drugs would be a strange thing, but lack of the combo pills in Europe might explain why moving to the US prompted the other poster to try the combination.
(eg https://www.excedrin.com/products/extra-strength/ )