"It would help if they allowed open-ended questions that are marked "community wiki""

And then we'd have quora, which would not be Stack Overflow. The intention of the site from day one was to encourage specific answerable programming questions that do not involve endless open ended discussion.

I truly believe this narrow scope of acceptable question type is why the site is hugely popular.

I don't understand how people don't get this even after five and a half years.