That Linux distribution is probably less than 6 months old. Windows 8.1 is over a year and a half old, and Windows 7 is over five and a half years old. Of course Linux is going to have fewer updates to deal with, so it's hardly fair to place the blame on Windows.

The actual update process though, hopefully Microsoft has fixed that in Windows 10. Even a comparably old Linux distribution would have faster update process, simply because the packages serve as the basis for an update so it doesn't have to worry about one update being a dependency for another update. On top of that, all of the updates can be applied to an active system. That results in the sometimes required reboot being identical to a regular reboot.