I don't know how many recall Dr. Metz contributing here in the past, but I do - back when I first showed up here myself.
Figured I'd pass this along; found today, on Hyperscale:
"5 July, 2012
I am terribly sad to report that Dr. Charles Metz passed away today. Charlie was a regular visitor and an essential participant in HyperScale's Forums from almost day one. He was erudite and enthusiastic, with a broad range of interests and an encyclopaedic library. Charlie brought the disciplines and talent from his lifetime career in academia to this hobby, much to the benefit of many HyperScale visitors over the years. He was generous, lightning fast and reliable with any requests for information. I will treasure my memories of this true gentleman, and I wish to convey my deepest sympathy to Dr. Metz's family and many friends. Charlie, the world was a better place wherever you trod, and your footsteps will linger long after you have moved on. You will be sorely missed."
My memory of his contributions here are similar to the above.