Maybe review the last 25 years? https://en.wikipedia.org/wiki/Timeline_of_fundamental_physic...
no experimental verification even possible in most of those, and/or the theory had been more or less fixed before ~1990
Many such cases. Very boring stuff now, not worth spending the money.
That's all experimental physics, not theoretical physics.
Well topological order sound like april first to me. Emergent gravity looks to me million times more plausible then that mess :)