With the release of JupyterLab 3.0, there is renewed discussion on making it the default interface on Zero to JupyterHub. Admins will be able to trivially change it back to classic notebook if they wish. Users will continue to be able to switch back and forth between classic notebook & lab - all that will be unaffected. This will only affect the default interface. We wanted to do a quick check with the community before making the decision.