I just received the sad news that Bill Pulliam recently and suddenly succumbed to lung cancer that was caught too late.
I never met Bill but corresponded with him and got his input from time to time. I respected and admired him immensely. As long time readers know, I think his analyses of the Luneau video and the Rhein Imperial Woodpecker footage are compelling. I encourage people to read all of his posts on the subject (catalogued at the first link).
He will be missed by many.