By its very nature, a work written for the stage uses an artificiality that requires a suspension of disbelief by the audience. By its very nature, the film medium can place a drama in a real world. Ironically, filming a stage play as it would be presented to live audiences in a theater, acerbates its artificiality and can result in a static or “dead” quality to the film.
Wisely, producers who capture material originally written as a stage play make adjustments to fit it to the film medium, such as filming it on location. Movies made on location are costly and schedules are constantly subject to change and many other time problems and issues…..