I really am baffled that so many people have had a hard time with this alternate reality concept. hopefully the STO graphic will clear it up once and for all.
I thought Squiggy
's simplified version of the chart presented it quite nicely, even elegantly:
This is what I came up with. Open to suggestions of course.
This clear things up? Everything that you've seen already has and already will happen. We're just not going to be seeing it again.
I suspect that the people who are having the most trouble with it grasp the notion of parallel timelines well enough, but are holding tenaciously to a premise which holds that parallel timelines don't belong in Trek, numerous examples of evidence to the contrary notwithstanding.