I am not sure what other people's experiences have been, but of the six food deliveries I've attempted via major food delivery apps, two were cancelled by the restaurant (ordered after 8pm, but before 10pm) and two did not go through because there were no drivers available (middle of day). I am in an urban area here in the bay area which normally has lots of uber drivers so I'm not sure what is going on. Perhaps I am an outlier.
Of the few places in my neighborhood still open for to go, the line is so long that if you order in advance my food is cold before I can pick it up.
We largely aren't ordering food at this point and just cooking at home. I did order a pizza the other day and it was really good and delivered on time piping hot, but it was a time of low demand.