You can use arrow keys to navigate in the map.
It allows for a parallel access to the discussed topic (multiple people "talking" at the same time)
It allows for an async access to the discussed topic (doesn't require all discussants to be present at the same time - they can read & reply later)
It provides documentation of the reasoning accessible at later times (retrospectively)
Discussing here exposes a risk of confidential information being leaked into the public
A registration is required - nobody ain't got time for that
I've tried to suggest to my GF we solve our argument with this tool - .... once