I made some attempts a few years ago to read this program in its entirety. I managed only the faintest glimpse and had grand plans of making it easier. I wrote

I made some attempts a few years ago to read this program in its entirety. I managed only the faintest glimpse and had grand plans of making it easier. I wrote down some of it: https://shreevatsa.net/tex/program https://shreevatsa.net/tex/program (Actually, a while after that I got more used to the style and I can now mostly read the program without the difficulties that used to bother me earlier, and I haven't gone back and updated the page. But I think chronicling my early difficulties arising was useful, as I suspect other new people may face them too: and I wouldn't be able to do it now: the "curse of knowledge".) More recently, I tried to connect some people who may be interested in making this program more readable, converting it into other languages/formats, etc: https://github.com/shreevatsa/webWEB https://github.com/shreevatsa/webWEB — please join if you're interested or can help or have already done something along these lines.