I am not entirely sure if this question has much value for a few reasons:

• 2K users have edit rights, and if they want to they can edit these questions, which is the purpose of having edit ability.
• The mandate of the SO engine was exactly the above, to always have an up to date and correct answer to a single question, which is why we have mechanism to close as duplicate.
• The community in due process naturally will update these questions as time goes by, and keeping a list here just adds additional overhead altogether.

As much as it may be a nice idea, this question and it's answers will simply become the same as the questions themselves. I agree with some of the comments, if you have the ability, edit it when you see, and move along.