I think this makes sense for applications applications that are just managing data maybe? But if your application needs to do things when you change that data

I think this makes sense for applications applications that are just managing data maybe? But if your application needs to do things when you change that data (like call to a third party system)... Syncing is maybe not the solution. What happens when the total dataset is large, do you need to download 6gb of data every time you log in? Now you've blown up the quota on local storage. How do you make sure the appropriate data is downloaded or enough data? How do you prioritize the data you need NOW instead of waiting for that last byte of the 6gb to download? It is like a useful tool, but not the only future.