I also found this --
On December 21, 2017 at 12:46, chicagoinstaller said...
Found this online while hunting:
"On the other hand, Cat6a is the most recent standard developed by the TIA for enhanced performance standards for twisted pair cable systems. The TIA does not recognize Class F Cable. They never developed specifications for Cat7 cables and they don’t plan to. They’re skipping ahead to Cat8"
But it was in an article from 2014 or 2013, so I don't know that it's really valid any more. While I'm at it, curses on the idiots who publish information on changing technology without putting their publication date at the top of the article. This one did, IIRC.