Earlier quoted context omitted.
And IE6 was similarly tons better the Netscape Navigator. It had XmlHttp, inventing Ajax, which revolutionised the web. Easy to forget that now. Also, did you know IE6 pioneered the browser web dev tools? IE6 was the first browser you could debug your JavaScript, css and html, which was copied by firebug about 12 months later. I can't even remember what it was called now, IE Dev toolbox? Something strange, you had to…
IE6 also had the first reasonably performant CSS/DOM implementation that was not just bolted on... Unless Opera 3.x came before?
It was actually blazing quick, far, far faster than the JS implementation I tried (like instant vs 20 seconds). While XSLT was hard to develop in and perhaps deserves to die its death, it really was a quite amazing bit of tech.