I've often found Google's cached copies of webpages useful when a website isn't currently accessible or when I would like to see a previous version of a page that has recently changed. Unfortunately, Google doesn't make it as easy as it once did to view such pages. Though DuckDuckGo doesn't provide cached copies of pages, it does provide a very easy method to access Google cached pages from the DuckDuckGo search field as explained at Cache. You simply put
!cachein front of a URL in the DuckDuckGo search field. E.g.,
DuckDuckGo states that "We would like to provide cached results ourselves, but unfortunately it is non-trivial to do so as it requires a lot of storage."