It is not surprising that this film is tanking at the box office since it is much too long and slow paced for the average movie goer's attention span. Indeed parts of it, like the agonizingly protracted opening scene where a New Yorker magazine music critic interviews the title character about her classical music esthetics, seem designed by writer/director Tod Field as a boredom experiment wherein if you can survive it without running and screaming into the night out of sheer and utter ennui then you are worthy to see the rest of his "masterpiece".
Thing is, though, that a lot of this film does approach, if not encroach upon, masterpiece territory. Certain scenes, like Lydia Tar's bleak Staten Island homecoming where she summons the spirit of her mentor Leonard Bernstein in an effort to recapture the humanistic values she has lost, are genuinely heartbreaking. And the sequences that deal with Lydia's manipulation of her acolytes are difficult to watch as we see how artistic power feels even more corruptible, somehow, than the political kind, perhaps because it is a profanation of a purer space.
And I think we can all agree that Cate Blanchett is one helluva fine actor! As are Nina Hoss, Noemie Merlant and Sophie Kauer who play various of her entourage/victims.
Bottom line: For all its faults I have a sneaking suspicion that in twenty years they'll be watching this and not "The Fabelmans". Give it a B plus.