#+begin_src elisp (org-startup-truncated nil) #+end_src Line truncation is necessary for code but anathema for prose. Prose lines need visual wrap as windows resize, so that texts can be compared easily.
Advanced Org uses such as large tables require line truncation. Tables are a code-like fixed-pitch feature. Users will write a paragraph of prose longer than the screen well before they discover a need for line truncation, such as long lines of code or wide tables. Users who need line truncation are likely to know about it, whereas users who need line truncation off are unlikely to know what it's called. Learning about line truncation is an unnecessary hurdle for beginners. Therefore the default should be nil.