It would be great to have an online platform where I could write, run, store, and share small python scripts. I recently tried to compile a python script to an exe for Windows and it was a disaster. It was a simple script that extracted a few polygons from an ArcGIS map service and output the data to a GPX file. It worked great on my laptop but the EXE failed to run on the laptop of my coworker who needed the script.
Having a Jupyter Notebook server in ArcGIS Online would be a great time saver. I would no longer need to worry about how to host and share my Python scripts.