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First page of the Elm guide covers it pretty well: http://guide.elm-lang.org/

> No runtime errors in practice. No null. No undefined is not a function.

> Friendly error messages that help you add features more quickly.

> Well-architected code that stays well-architected as your app grows.

> Automatically enforced semantic versioning for all Elm packages.



to be fair, all these things do not seem to be dependent on this new Subscriptions thing, as in fact they were there even before.

I am sure the new idea is good, but as grandparent said, the examples fail to convey why this is better than what we had before.


The "new Subscriptions" thing replaces signals, which is not what GP thinks is "what we had before".




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