browsing menus you know are up to date
A quick web search shows plenty of anecdotes to the contrary.
being able to specify allergies as much as you want
And you trust that?? If I had a serious food allergy I would absolutely NOT trust that a food delivery service would communicate those effectively given how much they push restaurants around, up to and including adding restaurants without their knowledge or consent.
I suppose in the strictest sense, sure, these apps are convenient, but you sure are paying a lot for it, and some restaurants charge extra for it on top of the fees, and the delivery folks aren’t getting a fair cut of the fees. Most of the fees go to big tech.
What about the technology that runs food delivery services do you find so compelling? I don’t see what’s so special about any of it.