Why can’t Sonos look on a local network for available shares?

 I read a lot of complaints from new users about how difficult it is to add a local share containing their music.  I remember years ago when BlueSound used to look for shares on my network.  Then a list of those shares was generated with the proper path shown.  All you had to do was pick which shares you wanted to index.  For some reason BlueSound eliminated that feature.  Can someone tell me why a feature like that would no longer be implemented.  

 Seems logical that Sonos may want to implement a feature like this to make life easier for new users.  Of course what might make this moot is the fact that new users would have to have available shares on their network.  In my case shares on a backup NAS were available and BlueSound found that share along with others I was not aware existed.