Github.io is a surprisingly good option. Gitlab.io if you like gitlab better.
Substack seems pretty popular and not terrible.
Edit: Apparently a bad idea: Dev.to seems to be fairly decent, and maybe more like medium.
Hosting your own static site via netlify (or similar services) is only the cost of a domain name.
Hosting your own vps-based site on gcp is also only the price of a domain name, and if you put the also free cloudflare in front of it, it scales well, but this route does mean a lot more maintenance than any of the options above.
Substack seems pretty popular and not terrible.
Edit: Apparently a bad idea: Dev.to seems to be fairly decent, and maybe more like medium.
Hosting your own static site via netlify (or similar services) is only the cost of a domain name.
Hosting your own vps-based site on gcp is also only the price of a domain name, and if you put the also free cloudflare in front of it, it scales well, but this route does mean a lot more maintenance than any of the options above.