@axes_of_evil I agree with the posters above, but putting that aside, we'd need to know more about your retirement plans to model success rates.
Let's say you retire with a budget of $30k/year, and a portfolio paying $30k/year in dividend income. Another great recession hits and dividends are cut an average of 20%. Now you have spending of $30k, but income of only $24k. What do you do about the $6k gap? Sell shares? Cut spending? The choice impacts how best to model your future retirement.
Next: same starting scenario but we hit another 1970s and inflation is running 10% for a couple of years. Now you still have $30k in dividend income in nominal dollars, but the same annual budget has group to >$36,000. What do you do about the $6k+ gap?
If you are getting the same yield, do you want a stock or a bond?
Well the stock has less inflation risk and less interest rate risk. So if we're about to repeat the 1970s I'd like the stock please. (If we're about to repeat the 1930s I'd prefer the bond.)
Figuring out which past decade is a better historical model for today... that's the tricky bit.