We’re building the wiki engine https://www.nuclino.com based on Prosemirror. It would be great to get your feedback on it! I think a single editing mode is the way to go and Prosemirror's flexibility allows us to strike a great balance between usability for non-technical users (via menus) and speed for technical users (via markdown commands).
I'm glad you like the UI. Unfortunately, making the entire wiki public is not possible at the moment due to our focus on teams and companies. They use it to share knowledge internally and explicitly don’t want to have it indexed and publicly accessible.
It could be interesting though to expand Nuclino for the use in communities in the future as a lot of requirements overlap.
