Vanilla is a product of Lussumo:
Documentation and Support.
film was originally created, as I understand it, as a means of recording plays
A lot of early films were essentially recorded plays but that's for two reasons, one being that the technology to do much else than film from a static angle hadn't been invented
The medium of comics is a medium unto itself. Trying to make a comic into a movie will often fail to capture the imagination, the joy of the comic medium.
When I said early, I meant really early, like when film was a new thing, as that's what Artemis was talking about. There are examples from very early on of filmed plays (particularly Shakespeare), but mostly it's documentary in nature, or it's just making a point of showing a moving image.