To Ssri:
It makes sense, but honestly it is just simpler to make multiple libraries for me. I'm not really interested in the audiobooks for the kids, e.g., which are 'handled' by a separate library, to give you the extreme example.
It is a wish for me, but I can live with the things Musicbee gives me already.
I only saw the browser like tab-thing and was thinking... Could it be possible?