Steve Pope wrote:
>
> As a datapoint, I did not hear of the "gravy" terminology
> until the modern (Internet) era.

For me it was two decades later than that. Not until well after the
turn of the century. Either on a FoodTV show or here on RFC. Someone
decided to call red sauce gravy? Okay. It's regional? Okay. It's
fascinating how regional terms end up spreading? Definitely.