Like for example, I left a quarry running overnight in my digger age. After about 5 hours, I got a diamond chest and a half filled up. I am voiding gravel, sand, cobble, and dirt. I had 2-1/2 stacks of certus quartz, 1-1/2 stacks of certus quartz dust, about 20 stacks of copper, multiple stacks of various other ores, and no iron. I repeat NO IRON. I guess it could just be bad RNG, but with so much requiring iron, it makes it hard to do anything.
I'm gonna saying it's laughing and mocking me. As of right now the quarry is down to around Y level 40. So I suppose it can still find some lower yet. Just really frustrating cause until I get a mass fab running I don't really have a reliable source of iron, and without iron I can't get anywhere close to it lol