> I think this has been proven wrong time and again. There's always a way into the market. Has it? I have the impression that monopolies are often toppled onl

> I think this has been proven wrong time and again. There's always a way into the market. Has it? I have the impression that monopolies are often toppled only when the market CHANGES, and that's usually not the action of a competitor. Saying "wait long enough and you can compete on different turf" doesn't feel like competition, nor a win for consumers in the meantime.