Just for preview release?
On their blog announcement, they say the .NET core only support is just for the preview:
https://blogs.msdn.microsoft.com/webdev/2017/05/10/aspnet-2-preview-1/
This preview version of ASP.NET Core 2.0 ships with support for the .NET Core 2.0 SDK only. Our goal is to ship ASP.NET Core 2.0 on .NET Standard 2.0 so applications can run on .NET Core, Mono and .NET Framework.
Does that mean this story is a non-issue?