>>362
I am aware, however, it's sill silly to equate "all that is" with "all that interacts with me in particular".
>In every way conceivable and inconceivable, the scenario in which things outside the bubble exist and the scenario in which they do not are identical.
This part is incorrect. As space has been expanding, much of the stuff currently outside our light cone used to be inside, and its existence in the past can have a causal effect on our present.
There's also no reason to assume that space won't start contracting in the future, which would mean that all the stuff currently outside our light cone would be brought back inside and begin to have causal interactions with us again, which would reunify our causal timelines. The presumption that stuff outside our light cone now has no causal relationship with us is not-even-wrong.
>>363
>Also - if I were to move away from Earth wouldn't my and Earth's "bubbles" split eventually?
If space were not expanding, no, because you cannot go faster than light.
Since space is expanding, yes, it will take a very very long time though.