Self hosting is great, but I am more interested in decentralized technology, whether as services or even radio. I think in the near future the world will experience major disruptions, technical, financial, or even political, that centralized solutions are rendered useless, and the average person would rather have a local connection instead (local as in both topology and physical medium, so you have your own wifi station serving the neighborhood for example), and of course self hosting will be part of it, but there should be protocols that support it either in software or hardware, so it would be great for example you host your xyz chat server instance and within the client side (phones for example) you switch to local mode in the app and connect to local server. I know some applications have already implemented this but not yet adopted and still too niche for the average person, let alone for other services besides chats. Some have already caught the potential and started making ideas around it, bitchat is an example, but relying on Bluetooth won't really do it in my opinion, instead, users would be having their own 5G BTS managed and operated locally, with an option to connect to nearby 5G networks, or similar tech like wimax.