The Glimpse Editor project shut down because there weren’t enough contributors, and the founder didn’t have enough time to do everything.

https://web.archive.org/web/20210531113823/https://glimpse-editor.org/posts/a-project-on-hiatus/

…and yeah it wasn’t just a rename, their github readme suggests they were making UX, accessibility, settings, and plugin changes to make it “enterprise ready” (not sure on the specific details of that though).

https://web.archive.org/web/20210729071541/https://github.com/glimpse-editor/Glimpse