I would like to know a list of all control sequences which are let equal to primitives in common formats. For plain TeX for instance, we would get the list \endgraf % = \par \endline % = \cr \repeat ...
For many beginners (and many with more experience), the biggest obstacle to using LaTeX is the difficulty of figuring out what is causing an error. A message about something not being \defed, for ...
As I understand it, LaTeX3 is a rewrite of LaTeX to fix the shortcomings of LaTeX2e, and ConTeXt is another TeX-based language (set of macros like LaTeX?) that solves quite a few problems that are ...