All things are effectively monopolies forever, until they're not. Facebook is undefeatable except that all the kids stopped using it. Google is printing money,

All things are effectively monopolies forever, until they're not. Facebook is undefeatable except that all the kids stopped using it. Google is printing money, but technically savvy people all know it's shit at answering search queries anymore. And on and on. x86 is too much of a juggernaut to overcome, except that most people just interact with internet browsers now, and the pace of security research means that legacy software is a big liability. Or unless you get the government to take anti-trust action 'against' you at your zenith, a la Standard Oil.