Several years back, I was 100% Windows based, and only knew Linux from the web hosting scene and running VPS Systems. I landed my current job which uses 100% Linux based OS’s on their customer’s equipment and software, Since then, I’ve gained a mountain of knowledge in the Linux admin and user space to feel comfortable enough to use it full time 100% in my household and administer it.
I think you would be surprised to see Linux more widespread out there, for example, a Raspberry Pi running Raspbian out in the wild mid reboot on signage or other displays, or being part of the brain boxes in industrial machinery. Then of course, - if you have an Android phone - well…that’s a form of Linux as well. :)