You have to promise us that you'll post about this in ten years.
Essentially 100% of my cassettes are lost or somewhere in a storage box. I'll be interested in seeing if your results vary!
Hell, I still have a pile of 45's from when I was a kid in those same obscure boxes.
Now, all the 'new' 45's are 12" audiophile based rehashes...
I think I prefer the old 7 inchers with the wide holes to the new 'two song' 45's full of wrung out female vocals. Maybe it's time to bring back the 'changer' so Eva Cassidy fans can listen to several in a row without having to perform the LP playing ritual every 9 minutes.