They were at the top of the pyramid, that's what happened. Same as when Microsoft had IE6, or the French phone market company was a one provider deal, or when

They were at the top of the pyramid, that's what happened. Same as when Microsoft had IE6, or the French phone market company was a one provider deal, or when Blackberry was eating the smartphone market. They stop to innovate. They milk the cow. It works for some times, then a new guy arrive in town, Firefox for IE6, Free for French Telecom, iPhone for Blackberry...