Your argument in these last two posts only works if one believes technical innovation can continue happening at a roughly constant rate. I'm not sure that's the

Your argument in these last two posts only works if one believes technical innovation can continue happening at a roughly constant rate. I'm not sure that's the case, and I'd certainly not like to rely on it. If, on the contrary, you view the rise of Computers and Internet as a once in 500 years event, then the Kodak of the world were very unlucky to have achieved power at the wrong time. Looking at technologies today, I see plenty of inefficiencies, but not too many potentials for a large scale market turnover. IMO Facebooks is weakest since social media is subject to changes fashion. The rest are deep seated with pretty foundational roles. I see the political climate or larger economy more suited for rapid change than the tech giants being unseated in the current political economy.