Oh, no doubt. I have a patch [1] in Sendmail from the early '90s w/r/t mailing lists, and I remember what an almighty hairball they were. But that's water under the bridge now, and the focus reads as quaint (even as the IM2000 architecture itself is fairly interesting).

[1] Not much of a distinction for someone running mail services in the early '90s, sad to say.