Echard, it is indeed impossible to create or accept an absolute referential frame, so any length of space, lapse of time, or velocity is always a reference to our conscious awareness of objects and rythms that "seem" to be stable, but in fact they are not. So the constant velocity of light is just a imagination of our limited minds, in the middle ages we were convinced that the earth was the center of the universe, it was our benchmark, benchmarks however are always changing like the so calles constants that we seem to observe in our universe, still thinking that we are the center of it.
Talking about 10^240 units of our universe is trying to understand it and comparing it with a Planck volume, however this Planck volume is also referential to other "measurements" that we made in our little circle of consciousness, it does not help, it only indicates how much we still are not aware of.
So measuring time and space in Planck units is not the definite way of describing our universe.
At first I made the same error, by accepting that I could use this reference as a solid absolute frame, it is not, but I learned that our universe as we are aware of has limits, and as we have no deeper insight we continue to use this measurement. The most important fact however is that I accepted the LIMITS, and accepted that these limits are variable.
Now for the granular nature of the universe, I do not think it is neccerry to accept that it is, by accepting the limit of our 4D causal universe you could also accept that after this limit we enter another scale, a scale with other properties, perhaps no longer causal (and avoid infinities)
As a matter of fact this limit (wherever it may be) can be crossed everywhere in the three dimensions, and everywhere in time, so you could also imagine that at every point in the universe we reach the same new scale, this scale being perhaps another dimension. (so where string theorists enter enrolled dimensions, we just eneter ONE new dimension.
This new unknown dimension we enter is the specific "block universe (absolute simultaneity) at that very time quantum.
So now at each limit point in our 3D universe we enter each moment in another block. All these blocks in our observable universe together form the time lines and can form probable time lines that become comprehensible for our consciousness.
keep on thinking free
Wilhelmus