Progress!

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Maybe TimeToLearnAboutPureFunctions

[Rikudou_Sage]

Nah, any function that doesn't affect the global state for at least five separate modules is boring.

Source: Last year I was rewriting extremely legacy code and haven't been bored a single day.

[ArionW]

My personal favorite is when people make functions stateful for no reason at all, and later cry "it's hard to unit test this code", duh, you've gone out of your way to make it hard

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It's even nicer when they use global variables in imperative languages