As Eric Weinstein and others have noted, the Chapel Hill Conference ends up sending academic theoretical physics into a complete dead-end cul-de-sac by establishing quantum gravity, which leads to string theory,
But perhaps the most fascinating clue to where the real vital off the books physics went is dropped by Eric Weinstein in a conversation he has with Joe Rogan about the Chapel Hill Conference.
And if you just swap out mass and replace it with energy in what Weinstein is saying here, you have an exact description of Townsend Brown's work.
Weinstein then goes on to say something that I find just as fascinating.