I was making a glib comment to sum up the entirety of the issue. I actually typed up the full pedantic explanation, then deleted it. I told myself it was superf

I was making a glib comment to sum up the entirety of the issue. I actually typed up the full pedantic explanation, then deleted it. I told myself it was superfluous prose. Guess I was wrong! Yes, the problem is that connectivity is often absent, poor, or slow combined with the fact that the app is useless without the entire dataset available. And you're collaborating with a team, so you have 10s-1000s of disconnected clients.