I read an article around the start of the Hero's program, PXG used to have proprietary properties to their clubs such as the 'internal metallic goo' in the cavity back irons, and other intellectual properties to help justify their huge price tag.
However, all other OEMs has now caught up and have similar technologies due to some legal issues related the golf business; PXG couldn't enforce their intellectual properties because it was based upon other older intellectual properties. So, if PXG decided to go to war legally, then other makers may decide to file forever lawsuits against PXG for any small infringements. Also, most of these golf technologies are also controlled by PGA.
It was some interesting read. If some people have more or better knowledge, please share. I'm just recalling from a memory 2-3 years ago(?).
