Yes, this is interesting in a small way.
I blocked cookies and then went to CNN.com, 15 items listed as 'cache' appeared right away, then another 10 when I went on NYTimes.com. Some listed as 'cache, cookies'. Going to WashingtonPost.com added another 32 items. BBC.com 47 items. NPR only one item. Seems like much of it is connected to ads.
I closed those pages and deleted everthing except the 2 apple cookies. Went on elpais.com, which loaded one item listed as 'cookies'... perhaps 'cache' is a rude word in Spanish so they have to call it cookie instead.
Like I mentioned, if I blocked cookies on my earlier MacBook this stuff didn't get listed, but there was perhaps the same cacheing going on anyway.