I started using Linux in 1994 when I was twelve with Slackware Linux. I remember having long fights with my younger brother about how to divide a 40MB hard disk between Linux and MS-DOS (for games).
It is important to remember how Linux and the BSDs made it possible for a whole generation of tech enthusiasts to educate themselves. At that age, I could not afford to buy a compiler or books as means of getting sample source code. Linux and BSD gave us free compilers, source code from the masters' hands to study, and generally a fun system to tinker with. I can not image being where I am now without that ecosystem.
I hope that future generations will be as fortunate to have these possibilities.