It seemed to me that most hand mixers in the past used centre post beaters. They seemed more sturdy and durable, thicker construction. I saw one recently by Kitchen aid and the wire beaters seem very minimal, thin, with little surface area compared to the centre post beaters of the past.
However I was wondering why most are now moving towards wire beaters?
I don't know if this is a manufacturing issue - perhaps it is cheaper and easier to build the wire beaters. Perhaps it is a cost savings approach? Or is there some other reason like some benefit to mixing with the wire beaters?