Quote - The V5 ponytail uses DS weightmapping and therefore, only works at the moment in DS. So there was no logic in making it fit on V4. I will look into creating a fit.... but im not sure it will be an entirely satisfying user experience to use it

I don't see a reason why ERC isn't good enough for a ponytail, really. As for a fit, it wouldn't change much for me. I'm certainly not about to pay $25 for a hair piece that "might" somewhat work in the app I use. Certainly as I said, I'm not against people trying out new technology, but having a hairpiece restricted to genesis seems like going out of your way to restrict yourself. We've had ponytails for ages, honestly.