Axum has been released in Microsoft DevLabs

What is Axum:

Axum is a language that builds upon the architecture of the Web and principles of isolation, actors, and message-passing to increase application safety, responsiveness, scalability, and developer productivity.

**Axum aims to validate a safe and productive parallel programming model for .NET.

you can find more inforamtion about Axum here

And here is Axum blog