I'm also interested.
>> What are the pros and cons
One "pro" might be that someone who would not have added an article themselves might still be tempted to reply to an article with a comment - for example, correcting some mistake or mentioning an alternative method.
One "con" is that anyone who wants to make a comment could already just add a short "article" instead. Except for the "threading" aspect, what advantage does a comment have over a short article?
