As if they needed to check for ““compatibility”” at all - just let the users try their makeshift coded-in-a-weekend browsers, or their 2008 version of IE.

The better question is why some websites even bother checking for the browser when the vast majority of people uses mainstream options that follow web standards and self-update.

Checking the browser version kind of made sense 15 years ago when updating the browser depended on the user’s awareness and willingness of doing so, and the lack of standards across browsers was blatant. Nowadays that’s pretty much useless. The maximum these sites should be doing is displaying a banner letting the user know their browser might be incompatible (because it’s likely not in a way that prevents usage), then fuck off.