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Another reason is that imperative languages are all that's necessary for many (maybe even the majority) of business use cases.

Really a lot of it boils down to if this else that, and little more.

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"all that's necessary" implies there's something fundamental about imperative languages that's intrinsically more basic. In fact, the opposite is true. If you're problem statement is "in response to event X, transform Y into Z, stick it in a database, then take A from the database, reshape it into B, and send it back to the user" then weak functional approaches are the natural solution. (languages like Elixir or idiomatic JavaScript).

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