Anyone who spread the lie that you never need to reboot Linux should be sentenced for treason
@BrodieOnLinux live patching the kernel while it is running is definitely a thing you can do on linux. Generally more complicated than just a standard package update, so I have literally no idea how to actually do it. But it IS possible.
But otherwise yeah, for desktop linux the story should be that Linux never FORCES you to reboot, not that you never NEED to.