Yes and yes on the inclusion to the canon. The number of no's here is shocking. It is a brilliant technical achievement, masterfully acted, thematically rich, and provocative. What is there to not like in that list? It isn't everyone's cup of tea. Certainly. But a work being canonical is not the same as it being likable. It is a matter of artistic depth, vision, and contextual importance. How can one not think this qualifies? The mind boggles.