> Like, who actually runs separate HTTP servers on example.com and www.example.com anyway? Everyone is hyperventilating over contrived "the principle of it all" examples.

I do. Over and over again. Having been doing that for 2 decades, and with a limited budget, I require things like SNI[1] to work. But of course, I could just triple the tech budget...

EDIT: And wrt "Time for a modicum of historical perspective." - please give it to me. I am keen to learn what I did wrong all the time.

[1] https://en.wikipedia.org/wiki/Server_Name_Indication