And yes, there are efforts underway to improve it (LaTeX3) but 2e works so well, there's not been much drive there.
And if you find LaTeX is so hard, there's always LyX...
Well, mostly math and science books. Very few (if any) fancy and well typespeced books by major publishers have been made with LaTeX. I know, because I know that industry. So, while TeX was once created to be a general typesetting solution, it has been relegated to something math and cs geeks use for their papers.
>And if you find LaTeX is so hard, there's always LyX...
A not really maintained, relic of a program, that tries too hard to work around the issues raised by a backend like LaTeX that wasn't really created with such GUI control in mind.
What do they use, then? (I'm actually pretty curious, because I am writing a dissertation that I currently build with LaTeX, but I find it much nicer to write in Org mode. I'm doing whatever I can to avoid a hard dependency on LaTeX for the backend, and to allow exporting to multiple formats.)
Why do they use whatever typesetting solution(s) they use? Does it actually produce better/nicer output than LaTeX (for non-math text)? Does it just have nicer syntax or friendlier error messages? What's the advantage?
if you want extensibility and still a rather lightweight syntax, try restructuredtext. it has exactly one flaw compared to markdown, which is the hideous inline link syntax (which practically forces you to use named links). that makes it less suited for forum comments (where you might want to quickly inline 1-2 links), but perfect for books (where you can neatly specify your link targets below the current section)