CKEditor was added to Drupal core in 8.x. It is a stable project but will stop being supported sometime in 2023, around the same time as Drupal 9's EOL.
Replacing CKEditor with the new and very much improved CKEditor 5 was identified as a Drupal 10 initiative.
This module aims to provide integration for CKEditor 5 in Drupal, and will recreate or improve on features in the core CKEditor, as well as provide a way for other contrib projects to add their own CKEditor 5 plugins and configuration.
This is currently being added to Drupal core at [#3231364]! 🥳 It landed!
Short name
ckeditor5
Supporting organizations
Funded multiple people to get this ready in time for Drupal 9.3
Implemented features and APIs for Drupal, provided invaluable technical guidance