Why use LaTeX?
The honest case for LaTeX — what it genuinely does better, and where a word processor still wins.
The reasons that hold up
Your document keeps itself consistent
Because you mark up structure rather than appearance, every heading of a given level is typeset identically without you checking. Nothing drifts over eighty pages, and nothing silently picks up a stray font size from a paste. This is the benefit people notice most once a document gets long.
Numbering and cross-references are never wrong
Insert a figure in the middle of a chapter and every later figure number, and every reference to one, updates on the next compile. The same applies to sections, equations, tables and citations. The class of error where a document says "see Table 4" and means Table 5 simply does not arise.
Mathematics
For anything beyond a lone inline symbol, LaTeX's maths handling is better than the alternatives and faster to type once learnt. It is why LaTeX became the default in mathematics, physics, computer science, statistics and much of engineering, and why its notation now turns up in tools that have nothing to do with LaTeX.
Bibliographies stop being manual work
References live in a separate database. You cite by key, and the reference list is generated, sorted and formatted in whatever style the venue demands — and reformatted for the next venue by changing one line. For anyone submitting to more than one journal this alone justifies the effort.
It is plain text, which makes everything else work
A LaTeX source file is text, so it works with version control: you get real diffs, real history, real merges and real blame. It is greppable, scriptable and generatable — a program can write it. And a text file opened in twenty years will still be readable regardless of what software exists then.
It is free, and it does not expire
The whole toolchain is free and open source. There is no subscription, no licence server, and no version that stops opening your old files.
It is often what you are required to use
Many journals, conferences and university departments distribute a LaTeX class and expect submissions in it. In that situation the decision has been made for you, and the question becomes how to work with it well.
The honest counter-case
LaTeX is not the right answer for every document, and pretending otherwise wastes people's time.
- There is a real learning curve. Your first hours will be slower than typing the same thing in a word processor. The investment pays back on long or repeated documents; it does not pay back on a one-page letter.
- Errors can be cryptic. A missing brace can produce a message that is neither near the mistake nor obviously about it.
- Fine-grained layout control is harder. LaTeX has strong opinions about placement, particularly of floating figures and tables. Overriding it is possible but is the point at which people get frustrated — and usually the point at which the default was fine.
- Collaborators may not use it. If your co-authors want tracked changes in a word processor, that is a genuine constraint, not a failure of taste. Browser-based LaTeX services soften this, but do not remove it.
A short rule of thumb
LaTeX repays you in proportion to the length, structure, mathematics and lifespan of the document. A thesis, a paper, a book, a CV you will revise for a decade — all clearly worth it. A one-off note to a colleague this afternoon — clearly not. Most people arrive because of a specific document that sits firmly on the first side of that line.