After following enough news about Linus Torvalds, creator of Linux operating system, find that most compliments he gets aren't about his capability of writing an OS from scratch, instead, they're almost all about his decision to make it open source.
Making Linux open source was a good move, I agree (who doesn't?), but to me, it was rather the only sensible thing to do by then.
No question, Linus is a genius, started programming in his 11 and figured out every single detail of 80386 CPU in his first year of university. He is even smarter than Bill Gates in technical, all Bill Gates did was the BASIC intepreter and he did not write any OS (though it doesn't mean he can't.)
After having a reasonable good OS written by himself, what could he possibly do next? Talk to IBM like what Bill Gates did in order to make Linux available on every PC? Form his own company and start selling Linux? License the OS to Novell or Sun?
You see the chances of success of those so-called alternatives.