This post from Dan Abramov about why he moved off Medium summarizes both why we’re no longer linking to Medium and why we’ve never put our content there.
Some of my Medium articles unexpectedly got behind a paywall. I’m not sure what happened and whether that’s still the case. But I didn’t do it myself, and that caused a blow to my confidence in Medium as a platform. I respect their need to monetize, but it felt wrong when done retroactively.