I\'m not sure what you mean. If you just respond to, or click on the responses to, each message, you can track a topic.
Often, over time, people may bring up similar topics in separate threads. All you can do to find all the posts on a general subject (say, pianos) is do a search.
Having said that, I do wish the archives were easier to search. Sometimes I can\'t find posts that I know I\'ve read or made here.