It's trivial to use duckduckgo or bing. It's people's choice to use google. Also, you can say "kleenex" and "band-aid" and "q tip" and "vaseline" or "coke" and everyone would understand, but they have no dominance, other than some people prefer to use them. I can easily find alternatives to all of them right next to them in almost any store I go to.

It was trivial for users to use non-IE browsers on Windows in the 90s. Ease of using an alternative is not the singular or most important definition of a monopoly.

It wasn't as trivial as today. People may have had to install non IE browsers from from a disc or download from slow and flaky internet connections. Also, I think a central part of that case was also Microsoft wielding its power to force other companies to stay away from non IE browsers.

Today, we're talking about a few taps to change which search website you want to use.

I work at a company where IE is colloquial with internet. If even mention chrome it's like I just told a homeschooled christian kid that atheists exist.

What kind of company/employees? Just curious

It's basically government but the private sector version of it.