Comment by mirashii

Ah, but now you're talking about solving an additional problem, delay tolerant networking, on top of mesh networking. This adds a whole new layer of complexity on top of the mesh network, and would probably only work as you say for a subset of services that are made to handle this type of unreliable network.

Also many common delay tolerant network implementations rely on message replication to increase the probability of delivery of the message. This puts additional bandwidth strain on the inter-node hops of the network, which as some of the other commenters pointed out, not actually all that high.