This so much. It is my only real complaint about notebooks. Would be so much nicer if a notebook was split in two files, like `my-notebook.input.ipynb` and `my-notebook.output.ipynb`, where `my-notebook.input.ipynb` would only contain code and be editable with any text editor similar to a .md file (and not some verbose xml). The output would contain all outputs, so that would be easily separated from the input if needed.

I can see the benefits of stuffing everything into a single file, but separating would be so much better IMHO. Version control is too important to mess with. Sometimes I want input and output to be version controlled, sometimes I only want the input. By splitting I can easily do that with simple .gitignore rules.