There is a point your musical collection becomes unwieldy.  Especially when you don’t know what you got in your collection or you become indifferent about exploring new music.  There is still one basic fact about your collection:  you can only play one piece of music at one time.  The more you have, the more likelihood music you have may become buried.  That is one advantage of having a small collection:  you usually are aware of the music you have.  I usually give every piece of music one playing.  Sometimes that works against you when the music did not catch your attention at that point.  You may not have been in the mood to hear the LP or CD or whatever format the music is in.  In my case I kept expanding my tastes so the music I became aware of grew.  It still comes back to the realization you can only play one piece of music at one time.  That is always a limiting factor to your collection.