Yeah, but unfortunately we haven't found anything that allow easy collaboration with folks who don't know how to use GitHub, and migrating away from medium is a paiiin. Though if you have a solution, I would be happy to push for it on the Jupyter side.
Unsure if you mean solution for migrating or solution for a good alternative platform, but Ghost has received a decent amount of praise. https://ghost.org/vs/medium/
That is my POV, but I'm not the only one deciding, and not all people contributing to the blog are coders, we had request for execs/manager for guest blog posts to review before publishing so a lot of poeple were against github.