Actually Laver and McEnroe and Philipoussis all hit with a straight arm. And most of the modern players today hit with the double bend.
But you are right. Some of the ways the elements are combined, particularly with the advantages of the strings, are prevelent in a way never before seen.
Ironically, they are not actually elements in Wegner's so called "modern" system. I'm working toward explaining that but trying to build a systematic step by step presentation.