Google used to offer a cached version of the pages they crawled. I found it extremely useful, because it meant that, once you found something in the search results, you could always access the content, even if the website was down or had updated in the meantime.
Oddly, even though Google removed this feature recently, it can still be accessed manually:
https://lifehacker.com/tech/google-wont-let-you-check-cached-pages-anymore-heres-how-to-do-it-anyway
Makes me wonder if Kagi has these cached pages as well, and whether this is a feature that could be implemented with minimal effort.