Obsolete flat adverbs

"As Emily Brewster notes in a short video about flat adverbs, prescriptive grammarians in the 18th century, being overly attached to Latin grammar, thought flat adverbs were really adjectives being used incorrectly, and warned against their use. Before this, flat adverbs were more common and varied than they are now. Exceeding is a good example. If we browse Daniel Defoe’s writing we find such phrases as: weak and exceeding thirsty; it rained exceeding hard; it is exceeding confused. Today this usage has an archaic feel."
from: "Flat adverbs are exceeding fine"

"Flat adverbs used to be much more common than they are today. For example, in Robinson Crusoe, Daniel Defoe writes of weather that is "violent hot." Samuel Pepys wrote in his famous diary of being "horrid angry." But most of these adverbs have long since been abandoned."
from: Merriam-Webster: Flat adverbs

Exceeding sad about the lost flat adverbs...