I believe that Medium is a bad actor on the web. They offer a bad reading experience: https://twitter.com/BretFisher/status/1206766086961745920
Writing on Medium benefits the platform more than the author: https://www.manton.org/2016/01/15/silos-as-shortcuts.html
Counter to Medium's promise of a wider reach, they offer worse SEO: https://pawelurbanek.com/medium-blogging-platform-seo
Finally, they want to centralize the currently decentralized world of blogging: http://scripting.com/liveblog/users/davewiner/2016/01/20/0900.html
This Mastodon instance is for people interested in technology. Discussions aren't limited to technology, because tech folks shouldn't be limited to technology either!