It’s hard for me to provide feedback because I personally like and “understand” the current layout of Jupyterlab (without the toggle)… When I installed the 3.0 beta version I was distracted by the toggle, so that’s a minus for me.
It seems to me that it may be useful to study some users to see what they get confused by in the interface, and to design solutions to specifically resolve those things. If such user studies are carried out on the new interface I kind of doubt that (1) the confused users will end up finding and clicking on the new toggle and (2) even after directing the confused users to the toggle that it will resolve their issues.
Again it’s hard for me to understand a problem that I don’t have; however in my view most likely there’s a change that could be made to the interface which works better for everyone, instead of creating the toggling between modes.
For example, and I hope I’m not digressing too much, one fundamental thing that confuses me in the interface is navigation to the launcher, especially being able to open multiple launcher tabs. To me the launcher is something that is “home base”. As such, it’s confusing to me that you can then have multiple home bases.
(screenshot showing multiple launchers)
For the classic jupyter notebook you have the tree view as home base. The tree view presents the functionality that users usually need first: either create a notebook or search the big file browser for your existing notebook. Contrast this to the current JupyterLab where the “new notebook” button (on the launcher) is split from the file browser. Also in the classic notebook you can always click on the Jupyter icon in the top left to get back to home base. In contrast, clicking the Jupyter icon in JupyterLab doesn’t do anything, and thus has less of a sense of a home base.
Those are my thoughts…