Well, there goes Andrew Mason's startup Descript...
I wonder if they made Descript an offer before starting this project. Although, the base problem of editing audio or video with text isn't that difficult. They probably thought it could easily be cloned. The devil is in the details however, and the rabbit hole runs deep.
What specifically is Descript doing that Adobe couldn't do relatively easily, or isn't doing already in its other NLE products (Premiere, Audition, Rush, After Effects)?