Twice in the past three days, I stumbled on a piece of printed media younger than a decade old mentioning a URL to an online video game that doesn't exist anymore.
Once in a Spirit Animals book by Brandon Mull that my 9 year-old daughter picked at the book barn specifically for it. She was disappointed but read the book anyway. The link now redirects to the series presentation on the publisher website.
Second in LEGO instructions for a 2014 set, there's an full-page advertisement for the PC/Android/iOS game LEGO City My City doesn't exist anymore anywhere I looked.
The difference in longevity between the two mediums is striking.