Substantial set of new and updated functions in Version 13.1 covers generalized listability, language conveniences, emoji computations, default toolbar, large-scale code editing, drawing in notebooks, Tree expansion, video capture, mathematics, customizable documentation, chemical quantities, machine learning, manipulating expressions in compiled code.
Microsoft will switch the C# extension to the Language Server Protocol to enable more advanced tooling, including closed-source capabilities such as IntelliSense.