Comment by jeremyjh

Browsers have been good enough for pretty much every reasonable purpose for more than 10 years, and compatibility has been really good for that long as well. Is it really challenging or costly to support a feature set that old? In 2017 an app I built worked on Chrome, Safari, Firefox and Edge without any effort or testing other than on Chrome. It still supports all those. At that time, there were probably more than 2% IE users on the general internet but this was B2B.

Just a couple of up-front choices regarding css frameworks and polyfill libraries were all that was required to do that.

I'm open to believing it could be costly for some projects, but I'm more inclined to believe its mostly chasing FOTM, ignorance and laziness that leads to < 98% support.