My understanding was it was too expensive to keep making acrylic platters or super platters, hence the all-aluminum platter. A few years ago I compared an acrylic platter, super platter and all-aluminum platter on the same VPI table and system. I personally found the super platter > acrylic platter > aluminum platter.
Harry is now on to ceramic coated aluminum platters and anti-static mats.
I agree with some above posters, that $50 mat to reduce static is good, no matter who makes it. I doubt it improves sound much. As for platters and Harry's business schemes.........well I agree with everyone: VPI is a great American company that makes products commensurate to its prices and the recent strategies of VPI are more business - money reacted, not a search for improved or absolute sound.