It’s a lighter-weight “notebook syntax” than full blown json based Jupyter notebooks: https://code.visualstudio.com/docs/python/jupyter-support-py...

Yep, lets you use normal .py files instead of using the .ipynb extension. You get much nicer diffs in your git history, and much easier refactoring between the exploratory notebook stage and library/app code - particularly when combined with the other stuff I mentioned.