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A language is a good start, but you need to provide something on top of that, or built on that, to make money.

MathWorks: Matlab -> Simulink + other toolkits. Hickey: Clojure -> Datomic. Typesafe: Scala -> TS stack. Whitney: A+ -> kdb/q.

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Clojure is an interesting model where you have the company Cognitect built around the language. You have the product arm with Datomic, the consulting arm creating client projects in clojure and finally paid clojure/datomic training. All three feed into each other while helping to improve the language ecosystem at the same time.

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