I feel like Food Delivery is a place where competition may actually have driven up prices for the consumers. I was gone from SF for two years and when I came back to the same neighborhood, I felt that food delivery became more expensive because of DoorDash, etc.

Places that used to not charge delivery fees now do, maybe because now they realized they could? Or because they have to compete for delivery people. Also, some apps now charge a 20% default tip. It is not rare to get three types of fees on top on one delivery order, even for something simple as a burrito.