Documentation Link

https://matplotlib.org/stable/users/explain/figure/interactive.html#jupyter-notebooks-jupyterlab

Problem

As discussed in this issue:
jupyter/notebook#7115

it sounds like the wording in the documentation should be clarified because a user installing unpinned dependencies will run into a problem with old notebooks.

Suggested improvement

Instead of:

If you only need to use the classic notebook, you can use

it could say

If you only need to use the classic notebook (i.e.,notebook<7), you can use

(I'd also suggest a better error message somewhere)