The thread is about cache hit ratio which is not that simple. A file is either cached at an endpoint or not, regardless of whether it's downloaded once or a billion times. CDNJS only supports ~3k libraries and gets most of its usage from jQuery and FontAwesome.
jsDelivr has an automated backend proxy to support any NPM package, Github repo, or Wordpress.org plugin. It also uses Cloudflare as one of its backends, so at worst it's at parity with CDNJS in cache hits or far better due to more network partners, more global regions, and more packages from more origins.
Anything on CDNJS is also likely cached by jsDelivr, but most of everything cached on jsDelivr is not even available on CDNJS.
jsDelivr has an automated backend proxy to support any NPM package, Github repo, or Wordpress.org plugin. It also uses Cloudflare as one of its backends, so at worst it's at parity with CDNJS in cache hits or far better due to more network partners, more global regions, and more packages from more origins.
Anything on CDNJS is also likely cached by jsDelivr, but most of everything cached on jsDelivr is not even available on CDNJS.