... Apple Music is not the best or most efficient way of indexing and filtering files. I have searched everywhere for a decent alternative but without much luck. I used to use MonkeyMedia when I had a PC and was somewhat disappointed when I moved over to iTunes almost 14 years ago. It’s even worse now that I have 200k+ tracks ...
It's been more than ten years since I last ran Itunes. Back then it was one of the most useless pieces of commercial software I'd ever come across. Perhaps not much has changed. Itunes couldn't really cope with a larger music collection, and at one point it decided to strip the metadata from a lot of tracks. At which point it had to go.
After that I went through several music players and eventually stuck with foobar2000. On Windows no other player comes even close. Foobar handles several 100k tracks without problem, and snappy. The only thing one could hold against it is that it has a bit of a learning curve and needs some configuration. Once this is done though, Foobar becomes quite impressive.
Have you tried out Foobar for Mac? I don't know how they compare, but if the Mac version is halfway similar to the Windows client it will be rather good.
