Oh huh, I was thinking the origin of the name "ristretto" was that espresso concentrates a certain amount of coffee in a small cup, whereas ristretto concentrates it even more: in this case it removes a cofactor of 8 and not just 4.
In other words, the joke around coffee takes a 90º turn with Ristretto because our first application was Bulletproofs where you need (among other things) a lot of orthogonal generator points.