This kind of compromise is made all the time. In the past you needed 4 engines to cross oceans, now it is normal to just have two. It saves lots of money, and

This kind of compromise is made all the time. In the past you needed 4 engines to cross oceans, now it is normal to just have two. It saves lots of money, and has been a massive success in terms of safety. The industry generally seems to get these compromises right when you look at the amazing safety record.