Why don't Windows Updates install all at once?

Question

Why do the Windows Updates sometimes require restarts in between installing updates? Couldn't Windows queue them all for install when your computer is restarting? What I'm saying is, why do we have to restart multiple times to install multiple updates?

In Ubuntu, we can install all the updates at once, and then just restart the computer. No need to install 5, restart, install another 2, restart, install 3, ..., etc.

Answer 1

Some packages need to restart the system in order to take effect. Other packages require higher versions of some of those packages, so in order for the updates that do not initially install, the prerequisites need to be installed first.