As others, I've grown accustomed to wrapping lines to fit in small terminals, and I started avoiding breaking the line randomly. Instead I try to break after self-sufficient parts of sentences so that lines flow naturally after one another. That usually means after a comma, before a connector word, or after an enumeration. It's not always possible, but I find that when I need to rewrite a sentence to be naturally breakable it usually reads better. Furthermore, each line often ends up expressing a whole idea, which means working on that idea usually translates to simple line operations, which fits nicely in an expressive text editor like Vim.
Hitting enter at the end of a line lets you manually wrap paragraphs in a way that will fit into an 80 or 120-char wide terminal.
Ignoring those line breaks is desirable when reflowing the text into e.g. HTML output