I think an important point that the author misses is that Medium is a blogging platform for people who don't want to fill a whole blog. I had a blog of my own and could never find the time or the content to make worth it for someone to revisit regularly. On Medium, I can write once a month, focus on quality, and not worry about whether people are hitting my site and getting disappointed. Add that to beautiful content, great other writers, and a good recommendation engine, and they have a great set of features that make it an attractive platform for both authors and readers. I can't wait to see what they have coming next.