"with HTTP using multiple connections these days"????
Um, have I missed something? (Answers on a postcard, but I'm expecting an overwhelming flood of "yes, you idiot, of course you have")
Back when I first used Netscape Navigator version 1.0, back in 1995, it had options to set how many parallel HTTP connections to allow.
I suppose that I've missed something about using some feature of HTTP/1.1 to have multiple connections fetching different parts of the same large object if the server supports partial fetches.
God, that makes me feel old. I used Netscape 1.0. On Slackware 3.1.
But I also remember being unable to use IE3.0 to download IE4+ from Microsoft's site in 2000 or so because Bill's boys had disabled the use of HTTP/0.9...