Internally, Microsoft is working on a number of features and changes coming to Redstone that are not currently present in the latest public preview builds. One feature Microsoft is working on improving is Windows Update, and in the latest internal builds of Redstone these improvements are now beginning to show up.
The latest internal builds of Redstone allow the user to customize “active hours” which is when you expect to be using your PC or phone. So for example, the user can set active hours between 5AM and 11PM, meaning Windows Update will not try to install and restart for any updates during that time. Only between 11PM and 5AM will your device try to install and restart updates.