My guess as to why most apps are now a web UI on top of a DB is because it’s easy to “install”. SelfHostBlocks is admittedly geared towards a central server serving web apps. Or at least apps with a desktop or mobile component but geared towards synching to a central server.
Feel free to give it a try though, I’d love that! Also feel free to join the matrix channel UF you have any questions or just to get some updates.
