Most people with a browser limitation are using a very old personal computer or device which cannot run the latest browser or OS, or does not have sufficient re

Most people with a browser limitation are using a very old personal computer or device which cannot run the latest browser or OS, or does not have sufficient resources to do so adequately. And yes, much of the modern internet is broken for them, but the basic and essential services are not, and that's what they can afford to use. They'll get an updated device eventually, when they save enough cash and the annoyances justify the spend for a replacement (perhaps second-hand), or when a friend upgrades and gives away their old kit for free. Either way, the replacements are often years old when obtained, so the wheel turns again. There are a lot of people running old devices. You can see this in the OS version web request stats looking at old OS versions people would not run if they had recent devices. More subtly you can see it in the screen resolution stats.