I've experienced cheap delivered food done well when in Bejing, and it's definitely a real thing. However if you tag a $10+ service/delivery/tip onto the bill, it kind of negates the "cheap" part of the experience.

The prices are higher (the same plus delivery plus tip) and the food comes cold and unless you’re ordering for a cold outdoor social visit you’re eating it alone/with the same company you see everyday. That’s a market that serves homebodies (I’m one half the time) and absolutely will fail for people who go out to eat and drink socially (me the other half of the time) when that becomes available again.

doordash is cheap?