[lacker]

To me this seems like an improvement in the direction that you want, in particular that notebooks are reactive. All too often I get a Jupyter notebook from someone else and try to run it on my machine only to find that some intermediate step does not work any more, because the original developer ran something out of order or removed a critical step. A reactive notebook seems more likely to still work after a lot of changes are made while experimenting.

[leephillips]

Not just more likely, it will work. Pluto notebooks are deterministic, and do not have the hidden global state that plagues Jupyter.