Have you thought about an underlying (FP-style) persistent buffer (e.g. https://github.com/amb007/persistent-buffer https://github.com/amb007/persistent-buffer)

Have you thought about an underlying (FP-style) persistent buffer (e.g. https://github.com/amb007/persistent-buffer https://github.com/amb007/persistent-buffer) that would eventually allow for a better-than-text-based diff & conflict resolution of program versions developed in this editor?