I’ve improved my WordPress instance with the ability to post to it through the REST API right from the terminal. How? See https://git.dejvino.cz/dejvino/wordpress-rest-curl
And why? I want to experiment with “brainwave” posts, i.e. very short posts that require only minimal effort on my part, but still provide a lot of value. To any potential reader and to me as well, since I can easily track and record what I worked on.