If I'm at home I'll look at the menu of my favourite indian/chineese/whatever place, phone them up, and they deliver it as they have done for decades.
I've spent two nights in a hotel since March, normally it's 70 a year. One night I ordered a dominos as I got back to the hotel just before 2300. The other night I ate out with a supplier.
Likewise with Uber, if I'm at home and not flying off somewhere, I'm not going to be ordering a taxi, either to get to the airport, or when I'm in a strange city on the other side of the planet.
I can see this is the golden age of takeaways and home-delivery (which basically means amazon or groceries), but I don't see it for takeaways.
So many times, I will be super busy with the kids, or work, or housework, and I will just pull up DoorDash with one hand (while the other is feeding a hangry 1 year old) and hit ‘reorder’ on one of my past meals. Literally 15 seconds and food is on the way.
Compare this to having to call someone, wait on hold, give my phone number/address, tell them my order, correct the mistakes, find my wallet, get out my credit card, give them the number, confirm the number and expiration and security code, then sign a paper copy with the tip when the driver drops it off.
Can I do the old style of delivery? Sure, but man it is a lot easier now.
Most fast food place either use JustEat or Hungry to accept your order and take your credit card information, if they don't have their own website or app. They will have their own drivers, employed and paid directly by the restaurant and they don't expect a tip.
That's what I compare any "startup" food delivery service to. So they will always be worse and more expensive, because a third party is now involved.
Why isn't this a thing? Is it that few/no restaurants have delivery drivers?
I can't imagine many restaurants benefit that much from the discovery features in UE/DD/etc.
.... from somewhere new
There's a maximum amount of time someone will wait (1 hour) and the product degrades after it's created (cools off)
It's very hard to do that when you're aggregating restaurants and drivers.
Uber can just write off the loss as more and more money is shoveled into it like coal was shoveled into an engine on a trail.