Where also plays into this. Property values and taxes play a huge role in comfort-ability . Also , health care plays a role in this as well. If I/we retire at 60, which is the current goal, at 1.4M, we would be golden. Our only expenses would be life ( food, ins, travel and such), property taxes, and health care.
Realistically, I don't see many people ever getting to that point in life. Between trying to keep up with the Jones' and living on credit, having a net worth that high is only a pipe dream for most.
Even at a modest 6% return, $84,000 is not a bad gig.