So? A middle class experience from 1622 is also affordable for most Americans today, and now we don't have to worry about raids from the natives! Clearly we have no right to complain /s
I'm not arguing things are equivalent to 1922 on an absolute scale, but on a relative scale they're closer than they were in the recent past. The prosperity of the previous century has shifted the goal posts for what defines upper, middle and lower class. But after a long period of shifting the goal posts in a positive direction, we've had three or four decades of things shifting in the opposite direction, and that trend appears to be accelerating for the moment.
As for upward mobility, that largely only exists for people with college degrees these days. And even then only a few select degrees are really worth anything. And college costs are insanely inflated compared to where they were in 1980, let alone 1922. Is it possible to better oneself in 2022? Sure, but I'd argue there were much more opportunities for middle class people just 40 years ago. A Unionized coal miner with experience could make an upper middle class salary without the burden of higher education that costs as much as a house. Ditto for many factory jobs.
A job at Walmart making minimum wage that hasn't been adjusted for inflation for decades does not have anything resembling the same purchasing power as a minimum wage job 60 years ago. Walmart jobs are notorious for requiring food stamps despite working full time hours.