Link rot is such a pervasive problem for anything that's older than 1-2 years. I wish more folks at all levels of managing websites would have some awareness that keeping URLs stable or setting up redirects is important for our collective memory.
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@eloquence It's annoying that "have a good archive of the content" seems to be at odds with "keep content up to date".
Wikipedia articles have built-in history tracking, so you can permalink to the version you saw, but generally it's better to link to the latest version, which is more likely to be missing the information you want it to contain.
