The Operatic Canon: Forgotten Chestnuts and Poisoned Violets

As a genre, opera is not a high earner. Indeed, the amount of money that must be invested to produce one is staggering: the costs are high and possibility for success unpredictable. Thus the question of programming has been a primary concern since the start of public opera. What will audiences want to hear? How can balance be achieved between the composition and its execution? Which works will keep the reliable patrons coming and draw in new audience members to the performance?