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Consumers may not be willing to pay subscriptions for writing. Or, there may not be a combined $1B/year of demand for writing subscriptions

But what’s interesting is that even the people who do expect this sort of exodus don’t seem to believe that there will be another  single, unified  platform that just replaces Twitter. The look and functionality of the original is simple to replicate, but no one seems to think that everyone will just move to New Twitter; everyone seems to

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Why does operating leverage matter? Because high leverage businesses show faster operating profit growth per dollar of additional revenue

Mobility of individual students in quantitative academic metrics relative to their peers over time is far lower than popularly believed. The children identified as the smart kids early in elementary school will, with surprising regularity, maintain that position throughout schooling.