> Why do I have to open Moebius sync to keep syncthing synchronization running

Because it’s a mobile OS and every single spent CPU cycle is a detriment to battery life? There is absolutely nothing in the security model that would prevent it from running - but it is essential that processes have a “structured” lifetime.

E.g. compare how much more graceful android is in low-memory situations, asking apps to serialize their state and then stopping the last used one. Linux oomkiller will just reap my whole display manager for some reason.