Incidentally, I was creating an image for a slide for a talk a few weeks ago, showing off HTML circa 1996 and decided to do it in Windows 95 (which is what I used to write my first web pages when I was 12) and it was a lot harder than I thought it would be (mostly because the intricacies of what HTML versions were supported in the included browser versions of the Electron emulator I was using), to recall what tags did and didn't work.
But I credit HTML with everything for me, as far as computer programming is concerned. Having a way to express markup in a text editor and see the results on a web page was life-changing.
Love to see first graders doing this now!