I'm pretty sure LaTeX can do all the documents I want to, e.g anything with complicated math expressions, various pseudocodes, computer science-y diagrams like karnaugh map, algorithm flowchart etc etc.

Of course, it's not all roses and sunshines, though. Depending on your usecases, usually need to import a few packages and sometimes they don't work out of the box easily.

For real life work I don't need that much power, though. But after learning various alternatives like markdown, asciidoctor etc etc eventually I go back to LaTeX. Oh well :p