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Have you ever had problem where two of your dependencies are each using a different version of the same library? Or have you ever wanted to incrementally upgrade an API so that you don’t have to change your entire code base in one fell swoop? That is where things like Unison or scrapscript can make it very easy.

Ok, I can see "incremental upgrade" as a use-case. Thanks.

I recommend reading the benefits section in the Unison docs[0].

0: https://www.unison-lang.org/docs/the-big-idea/#benefits

One reason for multiple versions of a library in a project is that the project wants to use 2 different dependencies, which themselves depend on incompatible versions of a third library.

ok, yep, that's one I've had myself. Thanks.

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