Yep.

And if it actually works correctly, it should filter out only threads you have access to. The feature did not undergo very extensive testing, but seems to work.
I also think we as a community should start being more lenient toward replies to very old threads, provided that the reply is actually adding some new information that would be relevant after a long time or to new readers, or is asking a new question on the old topic. (We really do have quite a large repository of threads on a large number of topics, many of which are still worth discussing with newer understanding.)