An incredibly powerful idea I've come to realize when using an Umbrel node, is appifying decentralized systems and node management. Once you have a base Umbrel node up and running, it becomes very easy to then jump onto additional decentralized networks outside of bitcoin. Also simple home network nodes, like PiHole, Home Assistant, and NextCloud that normal people might otherwise not bother with trying to setup and manage, but can improve self sovereignty and the ability to opt out of the surveillance state.
This kind of ease of management would be incredible to extend to wireless mesh networks. I imagine a project that attempts to make it very easy to buy a small kit to mount an antenna and manage with your node, and suddenly you are part of a backup wireless mesh. e.g. https://sudoroom.org/wiki/Mesh. Perhaps there are even ways to financially incentivize routing traffic or offering exit node services using lightning micropayments.
This would be amazing for many reasons, from disaster preparedness, to improving node uptime and redundancy when your internet goes out, and for generally expanding the user base and usefulness of wireless mesh networks.
Relying on centralized internet services is a huge weakness for both self sovereignty and civilizational resiliency.