I do use Music.app like this already, and while it's definitely okay-ish due to lack of alternatives, it's still lacking a lot.
It has also been stagnating for at least 10 years without any changes - apart from making the UI less consistent with the rest of the OS (e.g. "Reveal in Finder" being ⇧⌘R instead of ⌘R everywhere else [0], or the dialog asking whether I really want to edit metadata for several files defaulting to "Cancel" on hitting "Enter", while "OK" is displayed as the default button).
I agree that it's better than the rest, but that's easy :) It's hard for any 3rd party app to compete, as us nerds with large, well curated libraries are a determined and dedicated bunch, but still a quite small market.
[0] I'm aware that this is a relic of the short-lived iTunes Ping network, where ⌘R did something there
It has also been stagnating for at least 10 years without any changes - apart from making the UI less consistent with the rest of the OS (e.g. "Reveal in Finder" being ⇧⌘R instead of ⌘R everywhere else [0], or the dialog asking whether I really want to edit metadata for several files defaulting to "Cancel" on hitting "Enter", while "OK" is displayed as the default button).
I agree that it's better than the rest, but that's easy :) It's hard for any 3rd party app to compete, as us nerds with large, well curated libraries are a determined and dedicated bunch, but still a quite small market.
[0] I'm aware that this is a relic of the short-lived iTunes Ping network, where ⌘R did something there