I think the size of one's house is one of the archetypal measures of "prosperity" and it's been exploding over the past 50 years. More generally, the problem with these little anecdotes is that they're not normalized to anything. Anecdotes along the lines of "you could afford X on Y hours of minimum wage work," for example, ignore the fact that almost nobody earns minimum wage today: https://fred.stlouisfed.org/graph/?g=1M09. The percentage of workers earning minimum wage or less (some workers are exempt) dropped from 15% in 1980 to just 2% today.

These anecdotes also ignore numerous other parameters. For example, households are much smaller today than before. So looking at "median household income" understates increases in income for the middle. Without adjusting for decreased household size, inflation-adjusted household income went up 16% from 1970-2010. Adjusting for household size, it went up 34%.

Likewise, people are more likely to be single parents, etc., today, which impacts economic prosperity. From 1971 to 2011, married people with a spouse present did well: https://www.pewsocialtrends.org/wp-content/uploads/sites/3/2.... The percentage of such adults who are low income stayed flat at about 21-22%. But the percentage that qualify as upper income grew from 14% to 25%. For those who have never been married, the opposite happened. Low income rates went from 22% to 34%, and upper income rates stayed flat at 16-18%.