Can there really be 850 "essential" post-1900 works for a beginner? Isn't that impossibly daunting?
Not in any way, lol. There is far more on this list than there would be for an in-depth semester long 20th Century music lit class for undergraduate music majors, and it less replete [pedagogically lacking] as to imparting information about all the sundry styles and harmonic veins.
Still, I'll take the topic with its enthusiasm and effort to compile the list, and flawed as it is, the list itself, over the more usual near to silence on this rep ;-)