For a while, I actually thought that my Digital Ocean server had a problem, and wasn't getting Kernel updates at all, as every time I'd check for updates, I'd never see Kernel updates, even when I'd see other package updates. It never occured to me to reboot the darn thing to see what kernel would load, so I literally ran that box with a Kernel from back in May, when I could've been current the whole time! :)