Thanks for the great feedback! I shared your comment with the team behind this and they were happy to hear it.

We also discussed your question around embedding it. Right now, rich text editor is available in: Wikis, Issues, Epics, Merge requests, and Designs. The focus is to add it to more places in GitLab. There are no active discussions around open sourcing the rich text editor as a separate component though the source code is available.

We are gathering feedback here if you want to directly contact the folks working on this feature: https://gitlab.com/gitlab-org/gitlab/-/issues/379045

You can track progress on all the rich text editor work here: https://gitlab.com/groups/gitlab-org/-/epics/10378