Yeah, I do most of my web work on $2k-8k workstations but then I test on a pretty broad range of devices, including phones, laptops (currently using one from 2013 to type this msg), "obsolete" OSes and even text-mode browsers and of course screen readers. I believe in the broad universal accessibility of the web as was originally promised and try to ensure that same degree of accessibility whenever possible. It's hard to gauge how common that mentality is, but I hope it isn't too rare!