Exactly!
This is precisely the way we should look at tools: we should identify why we need that tool, but not necessarily stick with the tool.
For example, people said a while ago that the Workspace is better than the Playground for searching for things like implementors. While that might have been the case at that time, I think that use case is better served by the now existing Spotter.
It is important to understand the goal and not focus at the implementation. This is the prerequisite for inventing something new. That is why I keep on asking stupid questions like: "Why do you need this?" "When do you need this?"
Coming back to your point, I think that "note tracker" is one of the last use cases people use a Workspace for. I find this very interesting even if I do not necessarily have this requirement for myself. I think at the moment we can keep a renamed Workspace for that, but in the future we will probably end up with something else. The use case is noted in my book :)
Cheers,
Doru