In what way is time not linear? And your statement of not being able to erase the past without erasing the future is actually perfectly in line with the article. If you erase the past, the future then becomes non-deterministic.¨

Also, multiple timelines? What? I'm really confused about that.

Now, again, black holes.
Which models are you referring to? In what way do they describe the data better? Simplicity and elegance have no real scientific value. Do the models also describe the rest of physics correctly or do they have disparities in other places?

And I again sadly don't understand your last statement.