Maybe we need to classify gravity as 2nd generation, 3rd generation, etc. to describe the progress that has been made, or not made, in the history of gravity. I'm leaning towards an inexorable attraction towards spacetime by virtue of it's mass that produces a constant, ever-present acceleration. I'm still struggling with gravity. Something's missing and I know not what it is.
I myself have a small hypothesis (note I don't call it theory, as the rest of members do with their even-less proven theories than mine, for mine is derived from pure math and standart model) about gravity. Antonio sended to me a paper deriving that electric force is equal to space (length) and magnetism is equal to time. From this it is automatically derived that the particles for magnetism, called magnetic monoples, are also the quantum of time. And also that the particle for electric force, is equal to that of space. From this I took that then, the particle of electromagnetism is equal to that of spacetime. And as the particle of electromagnetism is the photon, then this is also the particle of spacetime. And by my theory of the photogravitational process where two gravitons crash to become a photon, then thus the fundamental paricle of gravity, electromagnetism and spacetime is the hypothetical graviton. And it make sense, because Antonio's proof of E/M=S/T is for when the gravity is exactly 0, thus, by my theory, all the gravitons that were there, crashed and became photons (thus, there is EM and ST). But the problem now is that in my theory 2 gravitons make up a photon, whiles in antonio's theory the number is different. Morever, I still must describe how do the gravitons (1d) cross dimensions to become photon (3d).
What would be the difference between standing in the flow of a river and that of being pushed through the lake on the front of a boat?
Is the ocean the past of the river or is it the future of the river?
With gravity, the body of mass is the ocean to which gravity flows and all bodies of mass within that flow are drawn with it to the more massive body.
Acceleration would need to be continuous since once a body of mass maintains a fixed velocity it then becomes the ocean and the center of flow.
The real question is "What is causing the flow and what is it that is flowing?" There is no gravitational effect to affect gravity.
Though the mathematical expressions are functional within the mathematical environment, once they are interpreted into common language, they become as abstract as the mathematical terms. This only perpetuates the current difficulties with the comprehension of the mainstream gauge theories.
As for how gravitons became photons, never underestimate the powers of spacetime. It's as if spacetime is a little more than just space and time, perhaps a third ingredient from gravitons crossing over into photons. There is something more here, keep going with your theory.