Oh, I know they have people who know this is a problem but every time that I spend time somewhere with an unreliable connection I encounter problems in apps and websites made by those companies. That’s the difference between knowing it’s a concern in theory and making it a regular part of your testing.

This is especially noticeable in their web apps because they rarely reimplement the functionality which is built in to the browser. When I’m on the subway, mbasic.facebook.com has things like a working reload but the app and Facebook.com will both fail to do elementary error handling and will often discard whatever you entered.