You're not alone in that sequence. I think a few of us here saw "effbot" in that email and felt our minds simultaneously trace back where we heard it as our heart sank. He was a big python contributor, it seems, but I wonder if he realizes how much that little guide shaped the internal tooling of many major companies.
I think it's hard, if not impossible, to overestimate how many lives Mr. Lundh's work has touched and improved over the course of his career. RIP.