Thanks for all the kind words about Blank. I wasn't sure that anyone besides my wife (who came up with the idea) and me would want it!
Turns out there are a lot of folks who want Apple TV sound without video. If anyone at Apple is listening, please Sherlock me (after you do Now Playing Plus, of course!)
Also I forgot to mention that Blank's quote duration can be set in the tvOS Settings app. Some use cases will be better with “No Quote”.