Someone invariably says something to the effect of "Well, you'd have to be an idiot to have your window shrunk down to that size! It's their own fault for being stupid!"
<rant> I get plenty of that here too, but It's not the user who is being stupid, it's the moron who tries to cover his design flaws with such a remark. Web content should adjust itself to match the user's display and window, not the other way around.
I'm so fed up with all those websites that show their content as a 10 cm (or 4 inch if you prefer) vertical band in the middle of the window, that my browser window is set to accomodate not much more than that by default. Wider sites should reflow to fit that. If they don't, they're even more wrongheaded than those that insist on turning your screen estate into 80% empty space if you dare to run your browser full screen. </rant>
Don't be such a short-sighted idiot.
The tools to do that are only a year or two old. It takes time to cycle through old tech and use new tech into a web site. There are ALWAYS some new thing that newer browsers will do that you can't use because it's brand new, and requires a rebuild of the site. Like, every week there is something new. For many years, people were waiting for IE8 to die out with XP.
Rebuilding a site is expensive, especially if it's a commercial site and the company isn't big enough to have an expert on staff.
Again, don't be an idiot. Or, grow up.
.... stupid millenials....