I can't say how many times I've used it to bring up data from sites long since "gone" from the Internet. In putting together this new forum I reckoned back to an earlier time when I maintained http://whitemeat.homeip.net. Of course you can't visit that site anymore...
But thanks to the good 'ol https://web.archive.org/ I was able to pull up the old site. Interesting to click through what was once a phpBB forum.