URL shorteners were always a bad idea. At the rate things are going I'm not sure people in a decade or two won't say the same thing about URLs and the Web as whole. The fact that there is no protocol-level support for archiving, versioning or even client-side replication means that everything you see on the Web right now has an overwhelming probability to permanently disappear in the near future. This is an astounding engineering oversight for something that's basically the most popular communication system and medium in the world and in history.

Also, it's quite conspicuous that 30+ years into this thing browsers still have no built-in capacity to store pages locally in a reasonable manner. We still rely on "bookmarks".