Very interesting article.
There are some interesting differences between the way the whole setup is put together in the USA and other places. Not really to do with flight safety, but the article's description of a "golden trout" is exactly the opposite situation to the UK. For the receiving hospital in the USA, the patient is a revenue generator. In the UK it is exactly the opposite: a drain on effectively fixed resources. It is obvious that in the US hospital management is keen to receive HEMS. In the UK it is pretty much exactly the opposite.