30 years ago Carl’s Jr. had a sandwich containing sliced roast beef, Monterey jack cheese, and roasted Anaheim chilis. They called it the California Roast Beef Sandwich.
I miss it to this day.
I think one of the biggest things about these old foods is that they stayed "crispy". McDonald's fries are soggy within minutes of taking them out, same as for Wendys.
No one ate any of it because it was healthy. Trans fats/seed oils/whatever don't matter to many who eat at these places. It used to be a cheap place to consume calories or grab something quick.
My favorite these days has to be 5 Guys but their shit is expensive. Around $8 for a double cheeseburger plain. Fries are good but get soggy by the time you get home and are fried in peanut oil.