Too much security breaks a system. My sync keeps breaking & I have to keep an eye to keep it always signed in. Every time after entering a password for sync you direct me to my email to click a verification link too. Doing this several times an hour has made a hole in the wall to my neighbors - from me banging my head in frustration. Surely there ought to be something in security settings to control this. Like many services can't you accept that if I'm on a personal computer I've already had to clear that security and then your security to sync. At that level a verification email should not be needed every time. It would be different if it was a public computer. But that is such a bedrock distinction theses days it baffles me why you aren't that granular. Heck I'd likely not sign into sync on a public machine or a cafe wifi anyhow.