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government and military websites from December 2016 onwards (a month before Donald Trump took office as President of the United States). They also stopped honoring the standard for crawling and displaying U.S.
#Wayback archive archive
However, the abuse of robots.txt by these cybersquatters led to so many defunct websites losing their previous archives that the Internet Archive themselves decided in April 2017 to stop broadly honoring the standard, now requiring explicit requests for exclusion. Infuriatingly enough, if the domain was taken over by a cybersquatter who then implemented a robots file, it also blocked you from seeing the earlier, legitimate versions of the website. The Wayback Machine also used to follow the robots exclusion standard, so if your favorite website (say, like FanFiction.Net, which actually did block its contents from being archived) blocked the Wayback Machine from saving it in its robots.txt file, then it and its content became inaccessible to the public. Websites like DeviantArt as well as several Web Comic sites are notorious for being nigh-impossible to archive, meaning that once they're gone, they're, well, gone. Sometimes, the particular page or image you remember most fondly will turn out to be missing from the archives either due to not many sites linking to it or, more commonly, due to it having a structure that's difficult to archive.
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That being said, though, the Wayback Machine is not 100% reliable. It's also possible to use the WM to instantly archive any given webpage, too, simply go to the address to save the newest version in the archive.
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