Even if the link isn’t dead, most citation templates that accept a |url= parameter also accept |archive-url=, |archive-date=, and |url-status=
Also, newly added links are automatically archived on the Wayback Machine iirc.
When a link is dead, does Wikipedia allow you to change it to an archived copy of the webpage from before it was taken down?
cucumberbob@programming.dev 4 days ago
MrEff@lemmy.world 5 days ago
Not sure. I have typically just done a Google search and refound the link under the same domain but with a different sub routing.