At peak (in ~2003-2005) IE had over 90% of global browser market share. Chrome on desktop has between 60 and 70, and afaik less on mobile, and less in the US. So, no.
> That doesn't happen now, OSes "just work" and people aren't changing their browser.
Given that chrome doesn't come on any popular desktop OS by default, this seems unlikely. If people weren't changing their browser, Safari, FF, or Edge would be the most popular due to coming by default on OSX, most linux distros, and Windows by default. (how popular is CrOS?)
> No, given chrome's market share other browsers are forced to implement it or people will consider those browsers broken.
There's a pretty decent history of this not happening.
I also don't really think your idea of how the web was used is a true reflection of reality. I was an elementary school kid back in 2002 and was using netscape and IE 4? 5? at the time, in school. I certainly had no clue how to jump to firefox or opera, nor did I know how to re-install the OS. Nor did my teachers.
I don't think the average web user back then was as savvy as you're thinking. Perhaps the average web user you hung around was, but that's just your social circles.