These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Adaptation Displacement: Everyone knows the opera but few have read the novella by Prosper Mérimée the opera was based upon.
Vindicated by History: It was critically and publicly reviled upon its premiere, because of the questionable moral choices made by the main characters. Bizet died thinking it was a failure. It is now one of the most famous and most beloved operas of all time.