gavra, Gourmet Glatt could fit into the same category you’ve described for Pomegranate. But that is a display of “extreme wealth”?! I mean those are all very expensive food items that most people don’t often buy, but luxury is relative. An expensive (i.e. $25) pen is a luxury considering you can buy a pen for 50 cents. Purchasing a fancy wallet versus a cheaper wallet can also be called a luxury. And an infrequent purchase of artisan bread and fancy sliced-to-order meat (or nuts from the nut bar) in Pomegranate or Gourmet can be a luxury. But none of these I would call a display of extreme wealth.
A display of extreme wealth is more along the lines of having a yacht or new Lamborghini. A display of wealth is more along the lines of going to a hotel for Pesach. But being an occasional customer of a fancy food item in Gourmet Glatt (let alone being in the store simply to purchase milk) isn’t a display of wealth, let alone extreme wealth.
Sure, of an individual. But as a community, it shows that the community has excess that can be spent on luxury items, so the stores stock them.
It isn’t Rav Aharon’s (or even Rav Shneur’s) Lakewood anymore.
I’m still interested in the verbal tour, if you have the time.