I knew about Linux when I was 10, and Linux was only like 2 years old at the time. How does someone be online in any capacity these days and not know about Linux? Linux users are everywhere and they never stop talking about Linux!
I heard the name Linux from Minecraft being available on "Windows, Mac, & Linux" when I was maybe 12-13 (2014-15), but I never looked into it, and all I thought of it was it was some kind of really obscure operating system. I wondered why I'd never seen a Linux computer in tech stores. And Windows seemed perfectly fine, so why would I need to use it? "It probably has some crazy UI that nobody can understand"(except I didn't know what 'UI' was at that age)
That's back than... I've been using Linux as my daily driver now since mid 2021, and I've been on Manjaro for nearly 1 & a half years.
However, I've met barely anyone who even knows what "a Linux" is. I've met a guy who was only using Kali Linux because he wanted to hack or something; and a friend at my church who manages a lot of the technology and computers: him and his father tried using Ubuntu about 10 years ago when he was a late teen. Than there's another guy at my church who, despite never having used Linux in his life; surprisingly new a lot about it and was able to help me solve a display issue I was having earlier this year. I've nearly gotten my Mum onto Linux Mint for her laptop 😂, because she really only makes documents, browses websites, and checks emails, and really doesn't need to be paying for Windows & having updates forced on her regularly. As a matter of fact, I'm downloading it for her as I type.
That's really surprising to hear! I live in Australia and that may not have been available in stores here even back than... but maybe. Target is actually still around in Australia and a popular store.