I have the Gigabyte 1080ti Aorus Extreme
Fans were fairly dusty but I wouldn't say it was anything extreme.
Only strange thing I've noticed was there was some sort of....sticky dust on the backplate around the gold heat spreader.
I've cleared most of it but you can notice the area had something, like the color of the backplate in that area was sort of darker?
I can take a picture when I get home if needed.