I remember that scenes used to have the feature that you could specify a distinct output destination (directory, file-name prefix) for each one. In 2.9 this feature seems to have disappeared. Am I overlooking something?
I would set up linked scenes, each with their own active Camera, and specify a distinct output for each one. In this way, I could quickly and easily film the same set of stage-business from every camera just by cycling between the scenes and rendering.