I guess I also am not surprised but it is sad in a way. Nobody is getting younger and I suspect they were seeing diminishing subscription numbers like most magazines. I know Don has done articles on how he started it all. I believe Rusty was right it was a newsletter started when he was a teen. I think he did show some examples in the magazine.
I do know I've been getting more Scenery Unlimited emails lately and it looks like Don is getting rid of at least some of his collection.
I wish him all the best in retirement.