You can at least do the obverse: how much wealth/income would you need to go back? (Or, if say you're a MAGA dude dreaming of the mythical community past: how much income willing to give up to live in a world where women and gays and blacks know their place etc)

denlillaapan

Conceptually, the meaningful way to compare standards of living would be to think about how much of a premium someone would pay for today's lifestyle than those from the past.

econ

The Economic Possibilities Our Grandchildren Didn’t Choose, Part 1

Conceptually, the meaningful way to compare standards of living would be to think about how much of a premium someone would pay for today's lifestyle than those from the past. 

That has two big problems, though:
1. There's absolutely no way to assess the answer
2. Ceteris paribus is even more of a bitch than normal