Actually, most of the good things that have happened with the browser have a reference implementation in IE6. Their current "modern" standards were all written after that point.
The stagnant few years after Netscape screwed up Navigator 6 was actually a little mini golden age for web developers. Essentially one target, with a ton of features that are only now being recreated in modern browsers.
It's just a shame that Microsoft was so hated by everybody. Things like their sane Box Model endured 15 years of people referring to it as a "bug" until finally it got introduced as a CSS option and people were overjoyed to finally be able to specify the width of a DIV and have it end up being that size after borders and padding.