More than one in 30 users is using Linux on the desktop. That does NOT include ChromeOS (which you may or may not classify as running a Linux desktop - I do not).
That's a "thing", much more so than e.g. Windows Phone market share, or the Baha'i religion.
It was my desktop from '95 'till 2008. Then - tired of the always recurring wrestle with drivers and multimedia - I bought a MacBook. Never looked back.
1995-2008? That is some serious self flagellation. I have tried to use various Linux desktops from 2000 onward and, while they have improved immensely over the years, I can't see using one as my daily driver even today.