Conversation so far:
What is a librettist?
librettists managed to produce a libretto.
What is a libretto?
operas.
How was Rameau's relation with his librettists?
Rameau rarely worked with the same librettist twice.

Question: Why didn't he work with the same librettists twice?
Self-contained rewrite: Why didn't Jean-Philippe Rameau work with the same librettists twice?