Together with zrpnr, gabesullice, lauriii, bnjmnm, yashrode and hooromoo in Acquia’s Drupal Acceleration Team, I’ve been working on getting Drupal on CKEditor 5, because CKEditor 4 is reaching the end of its long and productive life.
zrpnr got it started in January 2021. We’ve been meeting with Reinmar 1 from the CKEditor 5 team to ensure a smooth automatic upgrade path from CKEditor 4: all functionality should be even better! Less than 10 months later, on November 11, 2021, CKEditor 5 was committed to Drupal 9.3!