Goal #2, your data is not trapped in a single device is the hard bit, especially with goal #3, the network is optional. For #2 to be true, this means the network is *not* optional for the developer, it is required. Thus the entire complexity of building a distributed app, especially one without a centralized server, which is particularly difficult even with modern local first database tools, greatly increases the complexity of writing this type of software compared to either traditional desktop apps or cloud apps.