Charlie... I am not looking for workarounds, nor complex, deeply hidden, unorthodox (in software world) operations. I doubt anyone on this forum, but selected few want unneeded complexity. I am offering a simplified suggestion. Kindly respect the wish, even if some kind of workaround is available.

Likely some people would like to use "global" favorites for Styles and tracks, but my humble guess, most of us use favorites on individual composition basis. If the feature is considered, there should be a global and persistent (that doesn't auto reset) Library toggle that saves "favorites" meta data for all content per individual project, flipping toggle would reveal global list, including individual project favorites as well.