I always mentally slotted prosemirror-collab/your recommended solution in the OT category. What’s the difference between the “rebase” step and the “transformation” step you’re saying it doesn’t need?
Great question. Matt has a comment about this here, and he has an actual PhD on the subject! So rather than doing a worse job explaining I will leave it to him to explain: https://news.ycombinator.com/user?id=mweidner