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I think he didn't mean that it's never used, just that it's never actually said in the real world.

My experience confirms this.

Yup, my bad, he actually said "people never say". But the way he presented it, seemed like he's opposed of it. But I still think it should be mentioned more in the industry so more developers are aware of it and think about it more often than not.

EDIT: Can't reply to Tommabeeng's comment (probably too deep). Yup, and I agree with the presenter's main point - that classes are not necessary in many situations, even for decoupling.

He does say about coupling & cohesion that "if used, they are pulling a fast one on you".

That's wrong. I like the key to his talk but the plague of large complicated systems is exactly coupling and incoherence. Classes are NOT necessarily the way to achieve these.

As others have implied already, he could just as easily have been referring to the words.

I think his intention was to explain that these are the same words (mostly from academia and taken up with reckless abandon via language architectures like Java) that may be thrown around by some to create the code mess (anti-pythonic) in the first place.

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