Grief. Dave Luce, creator of the Polymoog, passed away this last Saturday April the 15th 2017:
News is in that Dave Luce passed away yesterday, April 15, at the age of 80. That's him working on the Polymoog back in the day. I spotted the image and news in this tweet by @casadistortion. "RIP David Luce, designer of the groundbreaking Polymoog."