I was using nbextension for jupyter notebooks (not jupyter lab) extensively. Recently, I installed the newest version of jupyter (v.6) and most extensions are disabled because they are meant for v.4 or v.5.
As can be seen in this post, this problem is already 3.5 years old. I did try to use some extensions that worked in the past like "Table of Contents (2)" but at least with v.6 of jupyter it doesn't work. What are your experiences? Do I need to downgrade to v.5? Should I switch to jupyterlab?