[tadfisher]

The expansion of space is entirely consistent with special relativity (the source of the "cosmic speed limit"). What relativity says is that the speed of light is consistent in all reference frames, which leads to all the phenomena you've heard about, such as time dilation, redshifting, and the upper bound on velocity. However, you have to understand that space and time are the same substance called "spacetime", and adding new space changes the basis of your velocity measurement (v = dx/dt). It's entirely possible that adding space between two regions can cause those regions to separate at a velocity faster than light in either reference frame, because space is the `dx` in the formula.

Another apparent violation of the speed limit occurs beyond the event horizon of a black hole. Space itself is drawn to the singularity faster than light.

[Bradley_A_Pliam]

I worded my reply poorly. I mean to say, Your notion or model of the universe is all downstream of assumptions that redshift can only be related to the Doppler effect (apparently there are a couple types of Doppler effect as the article mentions and links to info relating to "a normal Doppler redshift"). If everything rests on that assumption, it would be something to scrutinize if more and more observed astronomical data continues to pour in contradicting the big bang or expanding universe.

Separating "space itself" from the objects that are governed by universal laws is like saying there could be a north pole without a planet such as Earth. Take away Earth, you have no north pole. Take away objects in motion, you have no basis for talking about spacetime. That's just my intuition, but it seems to point to a gap in explanations, at least from science popularizers.

[Bradley_A_Pliam]

This is all downstream of assumptions that redshift is a certain kind of doppler effect. Redshift could actually be something other than that, and space from outta nowhere feels like just wishful thinking to me. And why is that space getting introduced without also bring with it its own time component? This seems to contradict your point that we don't just deal with space, but spacetime!