One of Google Search’s oldest and best-known features, cache links, are being retired. Best known by the “Cached” button, those are a snapshot of a web page the last time Google indexed it. However, according to Google, they’re no longer required.
“It was meant for helping people access pages when way back, you often couldn’t depend on a page loading,” Google’s Danny Sullivan wrote. “These days, things have greatly improved. So, it was decided to retire it.”
Websites will never change their URLs today.
i maintain redirects for old URLs for which the content still exists at another address. i’ve been doing that since i started working on web sites 20-some years ago. not many take the time to do that, but i do. so there’s at least a few web sites out there that if you have a 20 year old bookmark to, chances are it still works.
Sites are actually 83% less likely to go offline these days.
Source.