Medium was designed by Ev Williams who co-created Blogger, then later co-founded Twitter. It’s a work in progress but has a lot of nice features. If you’re active here it’s pretty cheap to “pay to play” but since you can be part of things without paying that is O.K.
If you have created a lot of content elsewhere, I like the feature in which they import it and add the code in the backend so Google doesn’t penalize you for duplicate content.
I like how clean it is, and easy to use. I agree with about the HTML piece, but this is for the masses, not for esoteric grunts who learned HTML back in the day. (I built my first website when Netscape was at 1.0
It takes a little time to learn all the features of Medium. I am still learning.