Dr. Toole's lifetime of work is impressive. No argument. However, don't think anybody deserves the crown as all knowing expert forever. Maybe in the realm of loudspeakers his, and others, work is good enough. Although, an interesting quote is attributed to him "Two ears and a brain respond very differently to a complex sound field — and are much more analytical — than an omni-directional mic and analyzer." That seems to fly in the face of the belief that measurements tell us everything and our ears and brains can't be trusted. Also sounds like he might think there is more work to be done.
Economics are likely a major concern across all things audio. There has to be a market for the next best thing. Wonder if even possible for another like Dr. Toole in the current environment.