Wikipedia on Mozart:
Wolfgang Amadeus Mozart[a] (27 January 1756 – 5 December 1791), baptised as Johannes Chrysostomus Wolfgangus Theophilus Mozart,[b] was a prolific and influential composer of the Classical period.
British Library on Beethoven:
Ludwig van Beethoven was a very prolific composer, producing many symphonies, concertos, piano sonatas, violin sonatas, an opera, masses and several overtures.
NY Times on Bach:
If any measure of quality is applied to such a comparison, as it must be, Bach was one of the most prolific composers who ever lived; that meager output from Cöthen, for example, includes the “Brandenburg” Concertos, the orchestral suites, other concertos and the astounding solo works for violin and for cello.
So you agree that it's not an indication of quality, but claim that it's pejorative. Why?
> Morricone was more than prolific;
But he was prolific.