Funny you should mention printers
In former times I learned that the time programming a report was usually trivial compared to the hours making it print correctly. And if you really wanted to waste your life, try doing something with printer configuration. I thought those days were over, but...
Last week I replaced all my home wifi and installed a Pi-Hole DNS server. I expected problems, but it all went swimmingly. Everything connected to the new network: two PCs, a tablet, two TVs, everyone's mobile phone, even the washing machine (why?). But then on Friday morning I clicked [Print] and got a message that the printer was offline. Looks like I'd forgotten to reconnect the nasty little black Canon thing lurking in the corner.
No problem, just use the WPS function on a wireless access point and tell the printer to connect. Doesn't work. Oh well, let's try connecting manually. This is not easy, as the printer has a tiny display with no backlight and everything has to be typed in on its telephone-style keypad*. In accordance with best practice, the wifi password is a long string of varied characters, digits and symbols. I spend the next hour searching for the manual page for the keypad, and the next several hours trying to make the printer connect. I eventually give up at 2am.
Next morning the WPS feature works as if there'd never been a problem.
*Although quite new, this printer is equipped to send faxes. They've decided to eliminate the wired network port, but keep fax functionality. That will come in handy if I ever need to contact somebody in 1995. Why don't they include Telex? Put a Morse key on the printer?