Monday's landmark performance was the first staged work by a Black composer in the long history of a company that launched in 1883.
Norman's passionate soprano voice won her four Grammy Awards.
The opera legend stepped down ahead of opening night in "Macbeth."
The company suspended Levine in December over allegations dating back decades.
Two additional men have accused the famous conductor of molesting them as teenagers.
The Metropolitan Opera said they first learned about the allegations last year but took no action.
That's what it was like -- and perhaps still is: a delicious, venomous trashing of a serious and magnificent achievement that was not perfect by any means but was also profoundly memorable.