As I understood the article, the bubble collapses at the speed of light. If I'm understanding you correctly, you're arguing that since we've had 15 billion yea

As I understood the article, the bubble collapses at the speed of light. If I'm understanding you correctly, you're arguing that since we've had 15 billion years so far with no collapse, then odds are great that we've got billions more to go. My point is that if the bubble collapse is not instantaneous, then we don't actually know there's been no collapse so far.