In early 2024, I began investigating collaborative editing systems for use in Moment’s core text editor.In some ways, we are in a golden era for the problem. Several algorithms now claim to solve not only the online case (where many people simultaneously edit a document), but also the offline case (where people edit offline for an unbounded amount of time, come online, and “magically” their changes are merged together). I had read the papers and listened to the talks, and like others, I was init...