Sharklets is right however when you buy something you have the right to know what you are buying and whether we like it or not consumer confidence rightly or wrongly has dropped in this aircraft. As I stated it is the attitude that is wrong here.....
You know what you are buying; you are buying a ticket for one of the safest airlines in the world to take you from one airport to another very uncomfortably.
If you are still unhappy about this then pay more and fly on another airline that has no 737s in its fleet.