@ChameleonScales It has been rewritten. Initially it started with just the timeline and now the refactoring has touched practically every aspect of Kdenlive. This is huge because it will give the ability to add new features in a clean manner and bug fixing will be extremely easier to deal with.
@frd I'm not talking for myself. I haven't used KDEnlive since version 12.x.
However I'm still hearing from people ditching KDEnlive (e.g someone at the Blender Institute) for that reason.
@ChameleonScales Please ask this person to contact me so we can help to fix their issue. Many crashes or bugs might happen due to incompatible MLT versions as well.
Also would like to hear from that person if they have any ideas to better integrate Kdenlve and Blender. Note that next month we will have a coding sprint, so this is year is promising many positive stuff for libre video editing.