I'll make it quick.
Problems: Correct documentation for Blender is a moving target, moreso nowadays. It is desirable for old answers to get updated to reflect the new UI, new parameter names, etc. We get some questions that get closed as duplicates with links to old answers.
Suggestion: If we identify a question that has an old duplicate we more or less leave it alone for a while, suggesting any old duplicates as merge targets in the comments. Let the new question gather answers, and merge good answers into whatever is the better formed question.
Maybe there are limits to the merge system I don't understand, but I look forward to discussion.
It would also go some way towards reducing friction with new users.