Also known as link rot is the bain of the internet. In wiki, due to it's inherently fluid nature, this problem can be significantly worse.
I have many old sites, that I have resurrected and moved from domain names that I no longer own. Pages from 7-10 years ago contain links to video on Youtube, or other content which has long since been moved or taken down.
i wrote this page on the Permanent Wiki, 8 years ago, and it's last edit was 7 years ago. Originally it was on a domain specifically for the project (`permanant.wiki`), which I no longer own. Luckily is is trivial to more the wiki to `permanent.anarchive.earth` and local wiki links will remain functional - but I expect many links on the site to be broken.
# The Fix To fix link rot is a big ambition, and there are several large well funed intiatives in this space, with little incentive for any business to pay too much attention to what might happen to their website in 10 years time. It is individuals, communities and our digital cultural heritage that is adversly affected by link rot - large comanies can pay to maintain there content.
- IPFS and the Permanent Web
For the Hithhikers Project we care about the long term archiving and sustainability of our writing. The H2G2 website is 25 years old. C2.com is older, sites like these deserve archiving in a way in which they can be kept alive. The same can be said for a great dela of culturally relevant content.