Speaking of education/CS50: we (the Codespaces/Live Share team) have actually been very excited/privileged to collaborate with the amazing CS50 team, as they've built their student experience on top of VS Code/Codespaces (http://code.cs50.io). Lowering the barrier of entry for learners, and supporting student success, is a huge goal of ours, and so I'm looking forward to getting our tools in the hands of more developers, and iterating based on feedback.

Very cool of Harvard to keep c9 alive, I have fond memory of it. Having said, vscode is just superior in everyway.