Google are now where microsoft were when they launched IE6, adding features as they see pleased to support their own products and revenue.
Back then the web population was savvy and not so reliant on microsoft that they could jump to firebird/firefox/opera when things got really bad.
The modern web users don't have that option because google are far more dominant now than microsoft ever was.
Back then people would joke about their grandma being "stuck" on IE6, but that's the level of technical aptutide of the whole web now. Just ordinary people wanting to get on with their own business.
Back in '02 chances are you'd be re-install XP all the time and during one of those installs a technician could install firefox (or later chrome) and you'd be set up. That doesn't happen now, OSes "just work" and people aren't changing their browser.