It would be useful (and nice, plus perhaps a sense of achievement) to see how much repertoire I have available in each of my projects. I have 4 projects (actually 5 but "All Songs" are in the 5th).
Yes, I can create a set list and add all the songs to it in each of the projects but that seems unnecessarily labour-intensive.
If asked "can you do a 3-hour gig" etc, I could readily answer that question for any band.