Since I use BB exclusively in my projects I naturally wanted to test and see what happens. As expected there was an issue, the TinyMCE editor is gone from the text module. I created a GitHub issue to track this.
So I wanted to get this on your radar and see if BB would be willing to support TinyMCE v5 when it eventually ends up in the core. As I said, we literally started experimenting and testing today so a lot will change and I don’t have any details yet.