in my case could be works in progress - or abandoned ones I need to clean up - or chopped up ones to separate power supplies - loads and loads of reasons - often private!! - or maybe just not for public consumption!!!
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities