Thanks, Elirien:
These are very good questions - specific, and clearly coming from a place of genuine curiosity - with good reason! So it was an excellent contribution.
I'd be happy for this thread to be used for this purpose after its interesting start.
But I need to come back to this, and I will do so. I'm happy for members to post questions like this (or any others which are specific) and Kerry or I can offer our personal opinions based on what we feel we know. I think that might be valuable and interesting.
They will only be opinions. In some cases, we'll have no opinion, because we just don't know at all...!