Undergoing a relatively big change in the way I handle paragraphs / logical lines in text files in #Emacs.
Until recently I used to use `M-q` (`fill-paragraph`) in reflex arc mode to constantly "fill" text, i.e. to add line breaks so as to fit a certain text width.
I've now started using Visual Line Mode (built-in) and Visual Fill Column Mode (third-party package) to display long "logical lines" across multiple "screen lines".