If there are complaints about code quality in a jupyter notebook, chances are that someone is doing it wrong -- either the author is using it for demonstration purpose, for production or near production environment, or the person looking at others' notebooks is taking them too seriously.
Most code in jupyter notebook is bad, but that's fine, because nobody should waste time doing that unless they must reproduce the results or they are sharing the notebook with others.
Most code in jupyter notebook is bad, but that's fine, because nobody should waste time doing that unless they must reproduce the results or they are sharing the notebook with others.
Notable example of high quality notebook: https://youtu.be/zduSFxRajkE