It's been a few years since CKEditor4 so an upgrade to v5 is on the radar. But there is no decision or plan as of March 2019.
When compared to its predecessor, CKEditor 5 should be considered a totally new editor. Every single aspect of it was redesigned — from installation, to integration, to features, to its data model, and finally to its API. Therefore, moving applications using a previous CKEditor version to version 5 cannot be simply called an “upgrade”. It is something bigger, so the “migration” term fits better.
There is no “drop in” solution for migrating. In this guide we hope to summarize the most important aspects you need to consider before you proceed with installing CKEditor 5.
- Could be adapted for wiki syntax: https://ckeditor5.github.io/docs/nightly/ckeditor5/latest/features/markdown.html