To me, this is what I want from the new platform in terms of technical culture. More canonical posts. More rewards for merging posts together. Actually, I’d change the language from “click here to ask a question” to “click here to submit a topic”, or something of that nature.
Make it harder to submit and publish a question, because it’s curating a high-quality list of Q&A posts, and your “plz fix my code” question isn’t going to be seen by many eyeballs in the future. I’d make the apprentice system that was in rough beta on SE mandatory - you’re not going to get your post publicly visible until your teacher says “it’s good”.
I always thought Stack Overflow optimized for readers of the future, not the actual question asker. (Granted, with recent changes like the more reputation for questions, that’s no longer the case).
Now, this is a very extreme position, and not every question is canonical.