I see this tool as filling a clear gap in both the online and offline interaction between a data team and business stakeholders - living in the CRISP-DM cycle between Business Understanding and Data Understanding. It enables a level of data interaction and commentary that just isn't possible in Jupiter Notebooks!
I love the approach the Knarr brings to collaborative data exploration. Analysis is often a team sport, and being able to track your journey, save notes, and share is really needed in this space.