Rather than commenting on some of the surprising (for a technical bunch of folk) opinions voiced in this thread I thought I would heartily recommend that you all listen to the excellent analysis of the threat as presented on the superb Radio Four programme 'More or Less' broadcast early last Friday evening.
https://www.bbc.co.uk/sounds/play/m000drn4
A large dose of perspective don't you think?
Cheers,
Steve.