The checkbook.org food basket compared identical groceries from store to store, so it is not eating cheap, just paying less for the same food.
According to the Society of Actuaries, a 65-year-old male today, in average health, has a 55% probability of living to age 85. You might not miss the money if you are dead, but for those of us who want to leave money to family it is a key consideration on when to take SS. - https://www.rate.com/research/news/retirement-expectancy.
This discussion is on can you still retire with the stock market crash, not when to take SS. Yes, I can still stay retired, in large part because I don't overpay for good and services, like groceries.
I'm pretty sure that most of us waiting to 70 are well aware of our possible demise. The payback for waiting from 62 to 70 is 82.5 not 110.For many of us, when to take SS has less of a budget impact than where we shop for groceries. We've gone over this a million times in past threads. What most people in the wait until 70 camp forget to add is a probability factor. Sure, you make more at age 70 if you wait to collect, but your probability of being alive at 70 or beyond the payback period is not 100%. That is the actuarially neutral part. Yes, if you live to be 110 you will likely to come out ahead if you wait to collect, but there is also a higher probability you will collect $0 if you wait until 70 because you might be dead.
Checkbook.org says a household can save up to $3K a year just by changing where they grocery shop in our area, so factors like that have more of an impact on a retirement budget than when to collect SS. Saving $3K a year at 4% over 40 years comes out to over $300K.
DW and I have no heirs. Our SS benefits are very similar so no big change in survivors total benefit. Waiting to 70 makes sense for us.