SONAR needs some reporting features. Imagine a report that showed all the details for a project: which plugins were used on which tracks, a routing diagram, file statistics, unbounced AudioSnap and V-Vocal clips, and the notes from the File -> Info page.
In my day job I deal with databases, where reporting isn't just a nice add-on, it's an absolute necessity without which all you have is a meaningless pile of data. A SONAR project is a database, but one in which the data can only be managed via the application that created it, a very 1970's approach. Or worse, an IOS approach.
The problem with a grep-like text search tool like the one mentioned above is that you have to know what you're looking for in advance. I can imagine a tool that looks in your VST folder and makes a list of all your plugins, looks up their CLSIDs in the registry and then scans projects while aggregating data. Maybe I should write that tool.