Yes, Hebert's box is an artifact of the days well before our numerical models could even begin to correctly forecast storm motion. Paul Hebert of the NHC noticed that a lot of storms that happened to pass through that area did or could impact S. Florida, and it has existed sort of as a "benchmark" ever since. As you mention, however, it's best suited as just a tool -- our numerical guidance and understanding of the atmosphere and tropical storms are both much improved today and should be relied upon moreso than a climatological forecast.

As a note for everyone today, please refrain from making the so-called "one line" posts (like "I think we could see something in <insert location here> from <insert storm here>.") If you have a personal question to ask another user, please use the Private Messaging feature of the boards instead of asking it here. Of course, if it's a question related to the storms, their tracks or impacts, or something of that nature, please feel free to ask those here. (And discuss the storms here, too!) Thanks all...