true simultaneity

[anagogy]

I can imagine many situations that just aren't possible by our laws of physics or current reality. They are just too far removed from what is possible to be possible. So I think the number of possible realities is actually finite.

But see, what you call "physically possible" is just a set of agreements in consciousness. All realities are just that, a set of agreements in consciousness. Just because they are far removed from you currently know as physicality, doesn't mean there isn't a kind of physics that encapsulates it somewhere, in some reality. The vibrational distances between such a reality, and what we call reality, would be somewhat great however.