[tuanm]

Indeed. Some concepts are overused and I still don't know what they exactly are.

Anyway, it seems to solve few UX problems when working with Jupyter Notebooks.

[TuringTest]

Reactive notebooks are what change the workflow from command line-like to spreadsheet-like.

It may not matter much of you use the notebook as a glorified terminal, but it is a godsend if your workflow involves data analysis with heavy dependencies between filtered subsets.