Oh yes, Wi-Fi was cheap, but before HaLow we ended giving up because we couldn't get a meaningful density for the network to get far enough across town to start to be remotely useful, even with 10-15dBi antennas mounted outside.

About the messaging aspect, I mean that though a messaging app is great, I feel that the end goal is having an independent network from the telcos, carriers, etc. In that sense we're going to need to allow more than an SMS replacement.

And from there is born the problem. Bootstraping such a network for more than geeks is relatively impossible in that context. You either have a device that does one thing as a drop-in magic solution for newcomers to jump on, or you chase the better solution, but that brings as much complexity, if not more, as running the Internet...

And while I'm happy to see p2p and mesh research continuing, participate when I can, I just feel like it's a pipe dream that is far far away and I'd like to see it grow beyond the few dozens of decentralization geeks in every city :)