Without rehashing everything in this thread I have a few thoughts on the subject:
Rich vs Wealthy:
We've talked mostly about NAV and to me that is more about "Wealthy" than "Rich".
If you are, let's say, a Surgeon who makes $1M/yr but you are also a crazy spender who spends every penny (as crazy as this sounds, there are people like this) then you are "rich" because you are living an extravagant lifestyle that costs $1M/yr (well not actually $1M but the after tax take-home on it). That said, you have a NAV of approximately zero so you clearly are NOT wealthy.
"Rich" to me is about the "income statement". If you have a lot of income, you are "Rich regardless of what your balance sheet looks like.
"Wealthy" to me is about the "balance sheet". If you have a high net worth, you are wealthy even if you have MUCH less income than the $1M/yr Surgeon in my example above.
That said, the definition of "rich" varies greatly by location. I don't know
@betarhoalphadelta 's income nor whether that makes him "rich" in California but it would take a LOT more income for him to be "rich" than it would for me here in Ohio.
Wealth is less regional because you either have the net worth to live comfortably in an expensive locale or you don't. Ie, if you have a net worth of $10M you can afford to live more-or-less wherever you want. If you are retired with a net worth of say $3M you can live pretty comfortably in a relatively low cost-of-living area but you'd be stretching it to try to retire in Hawaii on that money.