After staring at the same formula for some years now F=GMm/R^2 it is now clear to me that the assumption among researchers that Newton gravity is instantaneous and therefore imply infinite speed of gravity assumption in Newton is heavily flawed. They are looking at G and M without knowing what G and M truly represent and then have made conclusions.
It is a bit similar to look at a car made from wood (for Example a Morgan 3-wheeler), and claim it not can move because it is a tree! Give me a break!
Proof That Newton Gravity Moves at the Speed of Light and Not Instantaneous (Infinite Speed) as Thought!
Both the Newtonian gravity force law and the Newtonian field equation contains the speed of gravity equal to the speed of light, not by assumptions, but by calibration. It is concealed inside G and M.
I can now extract both the Planck length and c from gravity observations with no knowledge of G, c or h. And can predict all gravity phenomena from these two constants (+ naturally variables dependent on mass size etc.). This is what part of string theory hoped to do, but had little success with, except making the math complicated.
We get reductions of constants, from G, c and h, to c and Planck length, and much more simple logic and intuition. What on earth do G represent? Has anyone observed anything that is meters cubed, divided by kg and second squared recently? Newton never invented nor used G, he was not mad!