My two cents...which is worth just about that...the film structure lends itself perfectly to a stage production, musical or otherwise. The dramatic device of mirroring the upper and lower classes is very theatrical by its very nature. I wish more films would work this hard to feel so easy. Where things become more difficult to translate is that there is a political overtone to the movie. It has only gotten more apparent over the years. The pessimistic ending is rooted in the political commentary of the bourgeoisie giving into their base instincts and losing their humanity. That is very easy to translate on screen. I'm not so sure how that would work on stage without it feeling like agitprop. Although, Chekov did a great job turning the political into the personal. I would enjoy someone attempting it with this movie.