I totally agree about the Automatic Updates sucking up bandwidth without the user's permission. I've had clients who are satellite customers who have been receiving large bills from their ISP. First, they get slammed with the initial download of Windows 10, then they are sharing the updates with other people. I'm glad that the setting can be turned off, by why in the world is it set as the default?
Windows 10 has been great for business. I don't know what Microsoft was thinking by putting an operating system upgrade in the hands of people who have no business doing it. I've seen it break antivirus, cause email not to work, seen issues with printer and graphics drivers. Last week I fixed a computer because the upgrade rendered the computer un-bootable. Of course, people don't know to back up their system beforehand, like we do.