When she did it in 1991 it was sort of an event.
But when it was revived in 1997 is was just as much an event as it was in '79. Completely new sets, costumes, designs, flying, etc.
In '98, '99, '00, and '04 it became much.

But still welcomed and did well financially each time.
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle