It is natural that some of the links in the posts stop working eventually. In some cases, the dead links are fixable. (And there are many editors on this site who try to edit such links.)
Perhaps we could collect here on meta various domains (that are often used in the posts on this site) where the links stopped working - but which can be corrected. We could split them into links that:
- Can only be corrected manually.
- Can be corrected in bulk by the search and replace tool.
Since Stack Exchange CMs sometimes do correct links in bulk, at least in some cases this could be used to fix the links without bumping any posts. (If we can find several domains which need correcting, it might save a bit of time for SE employees, if we ask for correcting all of them at once.) And even for the links which can only be corrected manually, having a list with a brief explanation how the links can be corrected might be useful.
Some stuff related to fixing dead links can be discussed also in the chatroom Boulevard of Broken Links.
More details on what can/cannot be done using the search-and-replace tool available to the Stack Exchange staff (which can "edit" posts without bumping):
- It can only be used to replace a given string by another string. More advanced things — such as regular expressions — aren't available. (Some posts on Meta Stack Exchange: Can the mass-replacement tool also replace and remove? and Shog9's answer here: How to find and/or change a set of hyperlinks on a site?)
- The CMs are willing to do this if there are a lot of links (about 100 or more) — if there are only a few, the community is expected to do that manually. (See, for example, a message from Catija in chat when a bulk replacement was discussed on MathOverflow.)
I will add links also to some requests for mass replacements on other per-site-metas — just in case some useful information can be found also in those posts:
- Board & Card Games: Mass-fix broken links from old usages of autocard functionality
- Hinduism: Is it possible to mass-update broken URLs to IndianScriptures.com with HinduScriptures.in?
- MathOverflow: Updated: Is it time to replace links to the UCDavis arXiv frontend?
- Mi Yodeya: chabadlibrary.org link structure has changed, and there are now many broken links
- Physics: Updating links upon site migration of https://www.mat.univie.ac.at/~neum
- Science Fiction & Fantasy: Chakoteya.net links are broken