Well damn this is a shock. I interacted with him quite a lot on the old board, particularly post-1900 over at least a decade. Often disagreed with him, but he was always polite. A lot of the time he was also right. Pretty knowledgeable guy, much above average.
Only interacted with him last about a month or two ago I think.
I knew absolutely nothing about him on a personal level, so interesting to read his obituary. Wish he'd shared more of his life with us.
Sad news but I get the sense a lot of people will remember him. I know I will.