When I saw this story I just assumed Stark was having some fun, not that it was something Manfred had talked about. Also kind of amazing he didn't actually mention the idea comes from the Bananas (though the one skeptic did).
Hard to imagine them really doing something this drastic. But I also get it. Baseball's actually succeeded in getting younger over the last five years - correlation if not causation with all the changes old-timers don't like.
It might fly if they only did it for the 10th inning (or, only in extras and still only once. Up to the team when to burn it).