All you've done here is take the tired dishonest "kids these days and their darn avocado toast and smartphones" trope and used different goods/services to spin it in a way to appeal to the median commentor on HN.
You're ignoring the gorilla in the room. Why can't one live in a comparable manner today and bank the difference? Because those things aren't available? Why aren't those things available?
> You're ignoring the gorilla in the room. Why can't one live in a comparable manner today and bank the difference?
For two reasons.
1. They're illegal. You're not allowed to build a house to 1936 climate, safety, and fire codes with un-licensed labor. And boarding houses were effectively banned.
2. Market. Most people would rather live in a smaller apartment than 1936 style un-climate controlled death trap.
And the reasons are the same for cars. You legally can't sell a new 1936 car, and even if you could most people would rather drive an 10 year old civic.
> Why can't one live in a comparable manner today and bank the difference?
You can do this. Just move to a sparsely populated area and work remote. Rural and semi-rural areas are basically the "poor", lower productivity areas within any given country, if you can arbitrage the incomes difference via remote work you stand to gain quite a bit.