After waiting several MONTHS for the smoke to clear from the initial release of Catalina, I finally took the plunge. I drowned. 
I have been a Mac user since System 6.0.3 (late 1889). My first iPod was the infamous 3rd generation with the four, individual buttons under the (tiny, monochrome) display. Actually, it was a GREAT machine and tougher than nails. Working half the time outdoors in all weather and autonomously, I used the living daylights out of it EVERY day. I finally replaced it because it wouldnāt die and I wanted something newer.
My music library, āpeanutsā to some, Iām sure, had more than 19k songs. I had spent easily several hundred hours curating the collection including album artwork appropriate to the original album from which the song came as well as a star rating for each.
My āhouse of cardsā finally collapsed and, for the first time since OS X was released, I did a CLEAN install of the entire system. All my ratings disappeared. Fortunately, beyond that <koff, hack, ahem> āminorā issue, things have been going well. Now - several months later - I am back to ALMOST normal with the exception of laboriously re-rating every song. Also, and this is a REALLY bothersome bug, I must re-authorize my system in order to confidently sync my devices which include an iPad and iPhone, both of which locally host EVERY song. This was a ālast resortā effort to squash the bug. I persists. If I do NOT do this, there is a good chance that all the content will be removed because [this device is not authorized to play this content]. ARGH!!
I still love and prefer Apple but this has been, BY FAR, the worst upgrade for macOS EVER and, quite frankly, the upgrade to iOS 13 wasnāt much better. If anyone can point me to a fix THAT WORKS for having to re-authorize my computer issue, I will be eternally grateful. Thanks for letting me āventā. Iām sticking with it would sure be nice to have at least SOME belief that Apple is listening. So far, I donāt believe it. 