I reckon the fact that you have NO control over updates is the biggest issue. One only has to go back a few months ago when MS put out an update for Office that virtually trashed it on some users machines. If that happens with Windows 10, you are stuffed until they fix the update. At least with 7 you can make the decision whether you want the update or not. In 10 pro and upwards, you can defer some stuff, but for home, there is no such option. I reckon they have shot themselves well and truly in the foot on this one. They want to be in charge of everything one does on their computer, nothing like being big brother hey!! this just does not go down well with me.