The currency is less fundamentally meaningful than the group of purchasers buying their basket of goods.

> Long-term measurements of value are kind of weird

They are worthless. Best case, you’re asking a traveler problem. Does an American tourist rejecting a local Thai delicacy render it worthless? Of course not. They’re different purchasers. Similarly, trying to compare pricing preferences across centuries is borderline voodoo—you’re doing spherical-cow math.