Conversation designers know first-hand how hard effective collaboration can be.
Just ask them to recall the days when conversation design collaboration required passing around flowcharts and diagram files.
Moreover, the assistant & conversation design process is made up of many moving parts. Beyond crafting interfaces, designers must also collaborate with team members and stakeholders, build systems, manage feedback, and consistently iterate to keep the process running smoothly.
Being able to work on the same file at the same time is fundamental to true collaboration & effective conversation design. Without it, working as a team on a big assistant can be cumbersome and slow.