@fresco,
Quote:...whether Einstein's deconstruction of 'simultaneity' had any bearing on time as an independent physical parameter.
Al's postulation of the relativity of simultaneity has certainly changed how "time" is viewed by most physicists. But that's all it is, a postulation, not a "proof."
Theories of relative motion based upon absolute simultaneity are just as robust and viable as special relativity. Such theories do not mangle the concept of time as we experience it, and they fully explain and predict all the same phenomena that special relativity does equally well (if not better).
In such theories the abstract 4-dimensional mathematical concept of "spacetime" does not come into play. Time is it's own "dimension," and space is a different entity consisting of the other 3 dimensions (length, breadth, and depth).