I actually assumed eating at home increase wouldn't be because of doordash, but because of improved quality and variety of frozen meals. I remember what was available when I was a kid was mostly mediocre to outright bad. Now a lot of things like quite good frozen pizzas and lots of entrees you'd normally get at a sit-down chain are available in the frozen food section. I'm a pretty poor cook but I can't screw up following the oven directions on a box and I'd get the result faster and cheaper than doordash.

It isn't as good as a home cooked meal but it is a lot better than the awful TV dinners I rarely ate back in the 80s.