They are being used -- for the purpose of allowing the internet to scale. But yes, we do need to be careful not to assign blocks that are too large. We're doin

They are being used -- for the purpose of allowing the internet to scale. But yes, we do need to be careful not to assign blocks that are too large. We're doing a good job of this (see any /8s being assigned?). We're also doing allocations only from 2000::/3, and there are five more completely untouched /3s available, so if we do somehow run out of space in 2000::/3 then we can start over with tighter allocation polices... five times over.