Yeah, considering the same person started the other thread....
He doesn't see how mining the same area over and over, and having the ore types effectively come TO him over time, works (and rather well).
The one thing I agree on is that it's a royal pain to go for one type of ore (in my case, Dull Copper) - but that's more to do with the BOD changes making the BODs way more common, than mining (I could meet my own DC needs even with changing ore types, prior to then).