In reply to Justin Tadlock.

Justin

A thousand themes which might feature this slider inherently implies that the market is demanding it from the developers. And while the number seems significant, put into the perspective of the tens of milions of websites built on wordpress, it is still but a drop in the bucket.

You already knew, before you ever wrote your comment, that most themes have more then one slider script in them, and the goal was to give the user choice, rather then binding them to just one option.