That update option window says "max 18 hours". Doesn't help when leaving computer for 24 hours+ to render. The other thing is you might have critical work happening, and really don't want any risk of problems due to updates. So even if you're not using PC, you don't want updates to happen for a couple of weeks or longer until project isn't so critical.
The forced updates, even for advanced users, is the single reason I refuse to update to Windows 10.
If you are not going to be at the desk for 24+ hours at all, then you would hit this slider[0]. Updates don't come through that often though. A patch every 30 days, a service pack every 6 months. I run 30 days behind on patches, and 365 days behind on service packs. If your machine is used that often for 24+ hour rendering projects, you might want a non-home edition of Windows10 such as LTSC.
I do agree though that there should be a simple option, "do not restart for updates until I click on a prompt". I'm on the same page, but I'm not convinced the situation is as dire as everyone makes it out to be.
That's a strawman argument, because an alternative was already offered in my post. Yes, you can upgrade your software to prevent it. I don't care what you personally prefer or choose to do, I'm just telling the facts and options with Windows.
The forced updates, even for advanced users, is the single reason I refuse to update to Windows 10.