Realistically Opera suffers from two problems: 1- the economics are terrible, 2- the niche it filled has been filled by something else. Opera, an in particular opera buffa, was spectacle: the Marvel film of its age. Well now many more people can see a Marvel film and while it costs more to produce than Aïda does, it's CAPEX not OPEX. And the Marvel films have better special effects than Lohengrin.

The same thing happened to silent movies: the technology moved on and the remnants remained as the domain of enthusiasts ("Battleship Potempkin" or "The Artist"). That's not a tragedy, it's simply the nature of things.