This is the first question with wiki answers.
For a wiki
Voting on a community wiki post does not affect the author's reputation. (ref)
As such there really is no need to keep all of the information spread across multiple answers.
Should the policy of this site be to combine the answers into one?
If the authors care about it being know they answered with the information earlier, they can edit the single wiki answer to note such.
On MathOverflow, I believe the policy is that "big list" questions should be community wiki but that, to the contrary, each answer should contain only one answer. The advantage of this is that reputation-irrelevant voting can then be used to sort the answers according to their interest and relevance to the question. I would suggest adopting such a policy here as well.
The most recent science/research/academic site to be launched in the SE network before this one, was Matter Modeling Stack Exchange, which has a tag called "one-topic-per-answer". On questions with that tag, users are highly discouraged from discussing more than one topic in each answer, and the Meta discussion associated with that is here. Users there are also discouraged from writing more than one answer to such questions, in order to avoid single-user-domination of a thread, but that site also doesn't use the Community Wiki feature for such questions either (which seems to be what we're doing here at ProofAssistants.SE.
Here are the 5 top questions (by score) with that tag, since I think it may be illuminating to see how the tag works there:
It's important to mention that if the Q&A is going to be a FAQ (which may not be the case for the linked example in this question) then all the answers are combined into the highest voted answer (after discarding or fixing downvoted answers). Here is an example of a FAQ on MSE about CW posts.
If you don't have 10K on that site you can view this screenshot.
