I guess I'm the only one that was a fan of SO's moderation. I never got too deep into it (answered some TypeScript questions). But the intention to reduce duped questions made a lot of sense to me. I like the idea of a "living document" where energy is focused on updating and improving answers to old versions of the same question. As a user looking for answers it means I can worry less about finding some other variation of the same question that has a more useful answer
I understand some eggs got cracked along the way to making this omelette but overall I'd say about 90% of the time I clicked on a SO link I was rewarded with the answer I was looking for.
Just my two cents
I also agreed with this vision. It was meant to be more like Wikipedia rather than Reddit.
The problem with duplicate questions is that they weren't duplicates at all, and mods weren't competent enough to tell a difference.