Going to fourth density? Or fifth?

[Tenet Nosce]

What is the straightforward explanation?

Self-deprecation results in ego inflation.

I require an utter lack? I simply do not see a correlation with space/time, other than with the availability of planetary-scale vibrations which would otherwise be individually created.

There is a motion in time/space which you are referring to as the "opening of the gateway." This "opening" must have a space/time correlate, since the two domains are reciprocal to one another.

As you pointed out, "full instreaming" and "harvest" are not the same thing. The "availability of planetary-scale vibrations" you mention refers to the "full instreaming" not harvest.

And what is this event you speak of?

We can't say because it hasn't happened yet. But I think you are right in that it "will change the context in which society functions." The change of context is the event, the "transition period" is however long it takes for the new context to be expressed as actual functions of society.

I do not expect any seminal revelations, or revolutionary ideas

Why not? Do seminal revelations and revolutionary ideas discontinue upon "full instreaming"?

And due to their more-primary status, these ideas would overtake and obsolete the conventional.

Yes- "Out of the mouth of babes."