I didn't mean "that I used" to sound egotistical, more a proxy for more serious adoption. MySpace was mainstream, but Facebook was a more serious consideration because (at least as I remember it) it didn't allow the quagmire of horrific CSS crud MySpace did. It felt mature and accessible. I remember the 'social media marketing' of Heroes S1, where the kid characters had MySpace accounts and the politician had a Facebook account. Equally millions had used DOS before, but Windows got to people who didn't want to touch the command line. I can't speak to why that isn't also the perception for Apple's GUI OSes.
"More serious adoption" is relative. At the time that DOS, Google and Facebook went mainstream, their competitors would quite definitely have been classed as having serious adoption. And when the things that knock those off their pedestal (some, particularly DOS, were knocked off many years ago), the things that follow them may well have even more serious adoption.
My point is that the author's claim that "You won't get rich, famous and powerful by building a better mousetrap. You can only do that by being the one person who creates or popularises a whole new market segment" is simply wrong and has been shown to be wrong time and time again - including by the very people he's using as examples.
