How come I can't reply to "mod" below? https://i.imgur.com/k75wRiK.png

All Linux distros require a restart for kernel upgrades if you want to use that new kernel version. Or are you saying that Ubuntu actually forces the user to restart after a new kernel is installed?

Ubuntu forces a reboot on kernel upgrades fwiw.

I said almost. How often are you upgrading your kernel? Most of us don't upgrade very often.

Whenever the automatic update picks it up. So, basically all the time--every week or two, anyway.