Great new features, though it's a little bit shame that we still need to import a .ipynb file manually to work with it (I know it is not the VScode team's fault).

I really wish that the Jupyter community would consider re-design .ipynb file format, such as separating a source code (cells) as a file and stopping using JSON format.

The current .ipynb file format is highly against modern software engineering. Since it contains everything inside of a single file including giant binaries, it is almost impossible to properly version control, and there is no point of using human-readable JSON format because its content is already not human-readable.