What's the plan, JupyterLab-side to support real-time collaboration on the same notebook?
I know the google drive real-time API is deprecated (plus vendor lock) so that's out of discussion.
Rather by integrating with JupyterHub multi-user support for example.

It's actively being worked on. I believe there is already another issue which goes into more detail.
Can someone point into the issue so I can subscribe to it?
@elgalu You can find a discussion of the changes we are planning in #2540.
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@elgalu You can find a discussion of the changes we are planning in #2540.