[mindcrime]

Heh, that's a really interesting question. It's easy to forget that not everybody lived in the world of PC's running TeX / LaTeX, and Postscript enabled laser printers, etc. I have no idea how math got typeset back in those days... I'm too young to have any appreciation for that era in that regard.

[bombcar]

TeX was specifically written because Knuth was unhappy when his books went from being delicately hand-set by someone to being produced by a computer.

[ncphil]

It was the transition of commercial printing technology from "hot lead" typesetting machines (big brothers of the Linotype beasts I helped maintain while in college) to photo-offset, during which the fonts Knuth loved got "left behind" (as so often happens as proprietary tech evolves), that led him to write his own typesetting system. In the early 90s I used both vde with troff and TeX through grad school on a Kaypro 1 running CP/M. TeX was definitely the superior system for the kind of research papers I was writing (Chicago Style cites, mixed Latin and Greek text, annotated bibliographies).