I don't even think it's necessary to point out specific examples, though you're welcome to do so. All it really takes is showing the kind of numbers music databases like discogs (for both generalist and specialist consumers alike) are posting - millions of records added PER YEAR [1]. This alone shows "a million contemporary popular music tracks" is not representative of modern music's "state" whatsoever.

[1] https://blog.discogs.com/en/discogs-year-end-report-2018/