Edited sentence: If on the contrary, staging is sucessful, Ca Ira will probably be remembered as a very innovative Opera.If staging can't be done sucessfully, Ca Ira may be remembered as a beautiful piece of music but not as a good Opera.It is in fact, so different from other classical operas, that it may be very difficult to stage in opera houses.It is somewhat strange the critics found this Opera not innovative.The music being very interesting in itself, the ultimate sucess or failure of this opera will probably be determined by the sucess or failure of the first staging attempts