You can always count on Microsoft to tell you to update.

You've forgotten that your Windows 10 has reached EOL? Just leave it to Microsoft. They'll happily show you a full screen banner about it.
Hey, they'll even throw in a mention that you can get those Extended Security Updates if you can't update, for now. /* Of course you'll learn that the ESU is a paid feature a bit later. */
All of that because Microsoft cares.
/s

So, anyway, I saw that banner today. It was hilarious.