A technically-inclined person can beat them pretty easily (at least on the privacy/ethics front) by spending $5 on a Digital Ocean droplet and spinning up Nginx.
At this point in time, does Medium offer much discoverability? I know it used to, but at the moment, it seems like anything that isn't being charged for gets buried. As does much of anything outside of a publication, or not created by a social media influencer.
(and the percentage of people who even check the latest story for a tag has fallen even further since the last redesign).
It's pretty dang easy to move a Git repo of Jekyll pages anywhere, and serve them with 100% fidelity. In fact, the normal way of using GitHub Pages naturally makes it trivial to copy your content anywhere, and serve it from any web server.