The author started a blog but has considered stopping due to lack of readership. Though few may read the blog, writing it can serve as notes for the future, help release and clarify ideas, and give a sense of freedom. Even if the ideas are not original, sharing one's personal view can enrich them. Ultimately, the author decides to publish the post regardless of who may read it.
Do you maintain a blog? Are you getting value out of the practice?
Self-hosting (or hosting on github) using a static website generator like Hugo can be fun if you also like tinkering around with the blog itself. Otherwise yeah there's Medium, WordPress, maybe even Substack?