One of my primary uses for remote storage is as a synchronization server for my other devices. Syncthing allows this with simplicity, reliability, and expanse of features and configuration (plus clients for all major devices).
It also has the possibility to support "buddy backup" using untrusted devices. This could decrease the work required to implement buddy backup from scratch in my opinion.
In my mind, along with things like Immich, Syncthing is a must-have app and it's relatively simple to setup and use (works out of the box). I think it follows the simplicity of use direction HexOS is developing in.
