But with AI you kinda sorta should just build your own blog
Please don't. There is absolutely no reason not to use the extremely simple and powerful combination of:
* a headless CMS / static website generated, of which there are a bunch so pick the one you like the most. My go-to is Hugo but it is somewhat complex
* a static hosting service with a generous free tier like CloudFlare Pages/Workers, Netlify, Firebase Hosting, etc.
Your blog costs nothing, has zero attack surface and zero maintenance.