The fact that DoorDash was unable to turn a profit during the height of the pandemic is very telling: it's just a bad business model. Maybe they should get into people-carrying business to diversify? /s

On a more serious note, there is real value-add for small restaurants as it allows them to offload the delivery part of their business - and focus on the food preparation. But that could be localized and/or turned into a SaaS product.