The adoption evidence decided this. At one 600-person company, exactly three people used the standalone interface: the CEO, the head of engineering, and one engineer. Moved into Slack, adoption went to everyone, naturally, because asking Heidi became indistinguishable from asking a colleague.
Heidi's own knowledge graph makes the same point: it renders beautifully in 3D and at ten thousand nodes it is an impressive blur. A dashboard shows you the status and stops. A conversation continues: you ask what has to change, she opens the project, and the work starts.