If the Network is unreliable how is that any different to failing to updating / reloading a page?
Or you are referring to Web Apps that work offline?
Or you are referring to Web Apps that work offline?
Many native mobile apps have these properties, and if mobile web apps want to compete they will have to as well.
In practice, that means generally minimizing network traffic, being smart about caching data, and providing soft failure modes.
Neither Liveview nor StimulusReflex are well suited to this problem space.