We use notebooks heavily for onboarding devs & data scientists to Graphistry, and I only see that increasing.
Interestingly, for initial use, we increasingly start teams on their existing internal NB servers, and for new ones, they either start on Jupyter included in their Graphistry AMI or use Google Colab. So, very little outside of our quick start notebook skeletons hits GitHub.
So... How many notebooks are actually out there? Probably an even more interesting growth curve...!