I mean the level of conveniences in developed world are already much much higher even for middle class that we don't even think of them as luxury it would be for > 90% of world population.

My very typical American suburban home on a 0.2 acre lot is better built, has better views, parking, heating, cooling and so on than a 3 generation rich (from my standards) cousins' home in India. However they do have half a dozen servants at home and I have obviously none here.

So it does sound weird that people seek even further from developed world middle class point of view.