Ok, I apologize. I googled the wiki entry on multiverse and see that it's not just a belief that time branches causing multiple possible futures - although the "modal reality" idea seems to go in that direction some.I'm sorry but some clarity of what is under discussion is necessary otherwise I would be arguing about apples and you about oranges, a real waste of both our times.
If I understand the logic of the hubble-volumes, the multiple universes have something to do with scaling relative to different frames relative to the speed of light. In that case, I can see the interest and potential validity. I will have to study and think about these theories more before discussing.
Again, sincere apologies for my initial misunderstanding. Too bad no one just told me that I was talking about something completely different and I needed to go read wiki. That would have saved some bickering.