if you could get a full refund on any cd or lp you gave up, how many would be left in your collection?I'd keep 99%. I can't tell you how many times I've listened to albums that I initially dismissed as no better than okay, and years, even decades later, came to the conclusion that they were great albums. The reverse also happens and that okay too. Why would I ever get rid of a record just because I don't think it's the greatest recording of all time anymore?
If the low sound quality issue is ever addressed, music subscription services will make most questions about personal music collections moot.