Well, this is just a thought experiment - I'm not really in the process of loading up my car with all my music to go and junk it!
Does the idea of starting afresh and discovering new things beyond your current musical horizons not appeal at all?
Well, by the sound of it, you need to dig yourself out of the "staples or standards" mainstream rut, Chris.
Only joking

.... but I do find myself listening to and enjoying things way beyond the "classical music core" that dominated my early years. And I have to say I am enjoying the journey hugely. Each week brings something new and previously unexplored - some of it good, some of it not to my taste, but all of it is interesting.
I feel sure that would be true for any musical genre.
Maybe it's an age-related thing - I've just passed my 56th birthday and with much of the "staples and standards" I feel more than just a touch of 'been there, done that, time for something new'.