It is unavoidable that as Joomla! extensions develop, new features are missed by end users. You only need to look at Microsoft word as an example of an application suffers from feature creep - common requests for addiitonal features often include requests for features that already exists in the program.
There are some Joomla extensions that I am using that I know that I am not taking full advantage of. While the feature I found in sh404 yesterday is a new one (I think - I hope) it has still made me feel like I've been using a ferrari to drive to the supermarket.