So there's been a lot of confusion and drama recently with one of the sites (Twitter) that very frequently appears in the sources section of posts here.
While I find it unlikely that Twitter will actually become inaccessible in the near future, it does bring a salient question to the surface:
What happens if a huge furry art repository goes down and breaks millions of source links?
Wikipedia currently has a bot that automatically fixes broken links with archive.org links, but unfortunately many of the sources here are not amenable to this technique.
Twitter links, for example, are not often archived, and it's hit or miss whether archived links from twitter actually display correctly when they are.
Many furry art gallery sites also don't play nice with web archives, with many either disallowing crawling and others only allowing registered users to access posts.