Over at Forestry.io we replaced our markdown editor with a Prosemirror implementation!
Forestry is a CMS for Jekyll & Hugo sites, so having a great text markdown editor is really important to us. We used to use medium-editor but it caused a ton of problems for our users.
We’ve been using it for a couple months now and things seem to be pretty stable. There are still a few issues that haven’t been dealt with, but they’re all relatively low priority for now. Overall, we’re all very happy with Prosemirror so far!
If you want to check it out, you can create an account for free or check-out our Markdown Editor Docs.