Conversation so far:
In what time period does the 1972 film Cabaret take place?
Cabaret is a 1972 American musical drama film set in Berlin during the Weimar Republic in 1931, under the presence of the growing Nazi Party.
What was the 1972 film Cabaret's legacy?
In 1995, Cabaret was the ninth live-action musical film selected by the Library of Congress for preservation in the United States National Film Registry for preservation.
Was the 1972 film Cabaret's legacy successful?
The 1972 film, Cabaret is cited in Movieline magazine as one of the 100 Best Movies Ever, and was no. 78 in FilmFour's 100 Greatest Films of All Time.

Question: How long did the film's legacy last?
Self-contained rewrite: How long did the 1972 film Cabaret's legacy last?