This doesn't correlate with my lived experience. I remember almost everything except yogurt and milk coming in glass containers. My family and friends strongly preferred soda from bottles than cans, and we were lower middle class and we didn't use plastic 2 liters very often. (And several families drank raw milk - I know,
the horror).
Nearly the entire condiments aisle is now filled with soybean oil where it nearly didn't exist before. And it was a really big deal when McDonald's went away from using animal fat to cook fries in. Now pretty much nothing is cooked in oil from animal fat. This is certainly a change from pretty much the entire history of human food.
Various researchers are pointing out that glyphosate covers nearly the entire surface of the Earth and is found in nearly everything, including clothing and linens. It was not nearly as widespread in the '70s and '80s.
Exposure to various radio and now microwave (5G) frequencies was practically zero compared to what we began being exposed to in the '90s and is now pretty much everywhere.
Personally, I draw the major distinctions in video game technologies with the PlayStation and another later with Xbox Live! (the latter was really most popular with the Xbox 360). Previous technologies we would fairly quickly hit a point where it just got boring so we would go outside and play, most especially pre-NES. While more of a behavior factor, it is very important on pretty much every level except diet that we engaged in physical activity, social interaction, and sunlight.
As a side note, when I've tried to research it I've found that Gen X is experiencing a higher mortality rate than previous generations in pretty much every category. This correlates with my lived experience.