here a feature i search for and i've never see in any other software :
having a history (one number by date of update/add library folder) on music files quantity and about capacity occupied on hard drive.
by example :
june 2016 : 406 files with 369 MB space used
july 2016 : 812 files with 850 MB space used
august 2016 : 800 files with 840 MB space used
have a great day