> Casual users don't install an OS Your definition is useless: it would just mean that casual users simply never use Linux OS at all, and aren't supposed to us

> Casual users don't install an OS Your definition is useless: it would just mean that casual users simply never use Linux OS at all, and aren't supposed to use it, as these with your definition also wouldn't have an awareness to specifically buy a separate computer with preinstalled Linux. To make a definition of a "Linux casual user" in any way meaningful, you have to assume that it's somebody who would like to try to use Linux, especially without a specific desire to pay for a new computer for that. Oh, and also without the specific desire and readiness to use command line having the ingrained assumption that the GUI tools simply don't work, which is relatively common case in desktop Linux, even with LTE. By the way, my quote also shows what Ubuntu consider their casual user, based on the strengths they advertise: "The latest version of the world’s most widely used Linux platform for Kubernetes, multi-cloud and machine learning." I'd say, from their point of view, the target user on that page is, interestingly, somebody who needs but is undecided which Linux platform to use for "Kubernetes, multi-cloud and machine learning." Which is also interesting, but also doesn't follow that such a person would expect his installed OS to have broken applications every 6 months because of OS experimentation in compositors or whatever.