content: Thanks for that bit of info.  I grew up where I should have had a much longer history with computers but didn't get started with computers until later on; post-HS, circa 2000; at least outside of the restricted classroom environment. I'm not kidding though when I say, just last week, I was wondering to myself why Google or someone hasn't come up with their own, 'better' OS; and then went derp, Linux...and let the topic alone.  Then I saw this headline this morning and went, 'woah'.  Anyhow, I agree...so much of the hard part has been done already.  But, is it even remotely possible, given the advances in technology since...to start over from scratch, and make it better?  Have we reached a point where we can advance upon what we know, and instead of making Ford Model-T's, start putting out Mustangs?    Economically viable?  Probably not, but since when have most of the greatest innovations been until way later?