I am well aware of the raison d'etre for ETOPs. Apart from perhaps some southern routings between South Africa and Australia and the potential for trans Antarctic services, just where on the current route network around the world would 370 minutes be needed? It seems to me that the further ETOPS times are stretched, the greater the temptation for ops departments to be put under pressureto encourage crews to "press on". We have already had an example of an airline crew being instructed to divert because the aircraft's computers rejected a runway/weather combination that the type regularly deals with at the destination involved for that carrier. Whilst that cost the airline money, who's to say that an engine out on a trans Pacific sector operated by a 370 minutes certified carrier wouldn't tempt an airline's ops department to "encourage" a crew to press on to a destination, on the basis that the the rules say the aircraft is safe to continue. There is a growing tendency in many fields of commerce and industry to rely on the dictats of computerised systems and to work to the defined edges of systems and equipment limits on the grounds of economy. In aviation in particular this can quickly conflict with safety.