One of the big "selling points", at least as far as I can recall, of Linux-Based OSs is the ability to upgrade the system without restarting. But when I tried to install the new Linux Mint version ("Uno") the update manager (via the "system report" application) has prompted me to reboot my PC for the upgrade to take effect. According to this post reboot is required in certain system changes, that as far as I know, the aforementioned system upgrades do not change. So, I really don't understand why a reboot is required.
Why is that?