It depends what preindustrial means exactly. Most of the forests in Western Europe were cut well before that, I believe around 1800 is actually the trough. Your

It depends what preindustrial means exactly. Most of the forests in Western Europe were cut well before that, I believe around 1800 is actually the trough. Your 80-90% figure is probably back to the original state, but I would guess it's antiquity or pre-antiquity levels.