Isn't the official .NET debugger only allowed to be used from Visual Studio and VSC? I recall Jetbrains had to remove debugging support from their IDE for a while due to that license. Also the whole kerfuffle around hot reloading first being added to .NET (Core) and then the code being deleted because it was supposed to be a VS-only feature.

These things to me seem like one faction in MSFT wants .NET to be an open platform and another faction wants it to be a sales funnel for Visual Studio.