Two weeks ago I was at the Computer History Museum to help observe the 40th anniversary of Ethernet. It was literally 40 years to the day since Bob Metcalfe drew his first sketches of what became the world’s dominant OSI Level 2 network technology. It was a fun and festive day that ended, believe it or not, with dancing. But some of the celebration didn’t make sense to me. Or, rather, it seemed to me that important parts of the discussion were missing.

When, for example, did 802.11 WiFi become a part of 802.3 Ethernet? That claim was made over and over during the day and helped power the argument that Ethernet is today a $100 billion business. Yeah, right.

Parts of that argument are true. […]