You will always run into people who remember that McDonald's hamburgers were once 15 cents. They were also ready when you got there, because that's all they served, unless you wanted a cheeseburger, which were ready as well. The slowness of fast food is due to the variety of options available, but what happened to the price? You can go to a sit-down restaurant and get a plate of hamburger and fries and a drink brought to your table for $10, and it may cost you the same to get one at a window to eat in your car, and you won't know what a mess it is until you unwrap it a half-mile away. I wrote that before I watched the video, but the sentiment is widely observed. McDonald's isn't the only outlet where prices have risen dramatically. Weird History explains what happened, beginning with the history of fast food.
A Big Mac meal cost about twice that in California.