There’s almost always still a parking lot because of zoning laws, so you can eat in your car while parked.
My first time being into a McDonalds since I was a kid was earlier this summer when I gave my 3 year old the option of going in or staying in the car. I was pretty shocked at how barebones it was now. There weren't even napkins available and none with our food...which, when you have a kid with, is an issue.