Which blogging platform should I use?

If your goal is to build up a list of followers and build connections with potential customers and employers, go with Medium. Its recommendation system gets you followers quickly without any additional effort. Medium articles still show up in google searches if they're somewhat relevant, something I don't see happening with any of the other platforms. One drawback - it sucks for posts that contain code or demos.

Alternate goals may be 1) Maintaining a portfolio to send to potential customers and employers. 2) Or maintaining a journal of ideas and learnings primarily for your future self.

Turning up in search results may not be your priority with those goals. Then, the type of content becomes the dominant factor...

All the SaaS platforms - wordpress.com, Weebly, Webflow, Ghost, Medium - kind of suck for technical content containing code and JS demos.

Self-hosted WP is more flexible but you'll often run into formatting and small screen glitches.

For tech content, I'd prefer writing in markdown/asciidoc formats and publishing using static site generators like Pelican, Hugo, Gatsby. You have to be ok with using the command-line for them.

For non-tech content, any of them is fine. Webflow's layout system seems the most flexible and good-looking among the lot. Free WP.com, Medium offer rather limited customization.

Forget platforms and formats for a while and try to write at least 3 blog posts as plain text files/Word documents/Google doc. If you can’t write those three articles, forget about getting a blog because it will be forever empty.

Speaking from experience.