The problem is recognizing user intentions and the appropriate time for a context switch. If I launch an app or click a link in an email, I clearly signal to th

The problem is recognizing user intentions and the appropriate time for a context switch. If I launch an app or click a link in an email, I clearly signal to the machine that I'm ready to start a new context. However, the machine itself initiates something like a software update dialog, so my own intentions never come into play. Making a context switch against the user's expectations is asking for trouble.