Doomed in this context doesn't mean "is extinguished from all use". For instance, CAD is an absolutely tiny usage of an OS. Minuscule. Office...I'm in finance

Doomed in this context doesn't mean "is extinguished from all use". For instance, CAD is an absolutely tiny usage of an OS. Minuscule. Office...I'm in finance and massive numbers of people are either working on ancient versions of Office, or they've transitioned to alternatives. Office is absolutely enormous in scope, but it's one of those things that is detrimental to many workflows because of its powers. Many shops prefer webapps and on-demand generated consumables. Even Excel is very rapidly dying. The criticality of Windows has absolutely imploded, and is nothing like it was. If someone wants to use Linux, or OSX, or Android, or whatever, in most cases it fits in many workflows with absolutely no issues. On the home front the single thing keeping Windows running in most home situations is game compatibility. A massive number of home users never go outside of the browser, and those that do usually do just for games.