add your own:
This is a classic problem that eventually faces most successful computer platforms. The danger is not that RIM is about to collapse, but that it'll drift into in a situation where it can't afford the investments needed to succeed in the future. It's very easy for a company to accidentally cross that line, and very hard to get back across it.
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You get what you reward and deserve what you tolerate.
My sound property lists "the principle of progression" as: