Pick by where your posts live, not by the editor.
Where should the search value of your posts build up: a platform, or your own domain?
Medium and Substack bring readers on day one. The platform keeps the domain value.
WordPress.com, Wix, beehiiv and Ghost put posts on your domain, but the blog lives on their builder.
Self-hosted WordPress, Ghost Business with a $50/mo add-on, or Quillly. Every post builds the domain you sell from.
Every old URL needs a 301 redirect. Some platforms won't let you add them at all.
Judge platforms on the URL, the publishing pipeline and the SEO feedback.
Prices, trade-offs and a 5-question picker.