I guess I could have been clearer, but we aren't talking about smartphones, much less the fake pixel metrics that were kludged onto CSS to deal with Apple's introduction of retina screens.
And FWIW, little to nothing on the web is optimized for less than 800x600. We work with the fake pixels as just another measurement tool, but actually using most websites with physically less than 800x600 is brutal.
Menu's are. The content is usually just fine. I use 1366x768 on my 24" monitor and snap browsers to 1/2 of the screen. Most work fine...
Some are Funny and you see, Massive Hamburger (1/3 of the screen followed by a Cookie Consent taking another 1/3 of the screen.) -- I don't stay on these sites often.
And FWIW, little to nothing on the web is optimized for less than 800x600. We work with the fake pixels as just another measurement tool, but actually using most websites with physically less than 800x600 is brutal.