[lozenge]

If you use Firebase the syncing and offline access comes for free.

I suspect most of the first mobile developers used to be web developers and then they taught the future generations of mobile developers to also be like web developers. Query endpoints from the backend for individual features without building a local view in the javascript of the whole world. And slap some spinners and error messages on to give the illusion of responsiveness.

As for the backend, they just use whatever database they prefer.