The quality of food is immensely better.
For one, you can get actual fresh veggies and fruits year 'round, even in the northern regions.
They didn't have Whole Foods in 1960, dude.
In fact, 1960 was the era of Cheez-Wiz, TV dinners, Tang, Velveeta, and Wonder Bread.
I doubt any of the stores my parents shopped at in the 1960s Midwest particularly had things like avocados.
Quality has many facets - for example, I doubt they could tell you how often people in their youth died from salmonella, e. coli, or the like. Food was also significantly more expensive, and in colder regions fruit was nearly impossible to come by in winter months.
Was an apple from 1918 more nutritious than one bought in store today? It's possible, but then again nobody (in the developed world) in the 2008 recession was in danger of starving - a very different proposition than during the Great Depression.
Indeed they are. Here are some numbers from NPR (hardly a right-wing thinktank):
https://www.npr.org/sections/thesalt/2015/03/02/389578089/yo...
In 1960, Americans spent about 18% of their income just for food. Now it's less than 10%.
And, of course, the quality of food available to a typical American is vastly better than it was in 1960.