The official v5.7 release of ServiceStack with support for .NET Core 3 that a lot of you have been waiting for is now on NuGet. It also includes Async support for Server Events which should now be preferred when running on .NET Core 3 to avoid sync Response writes.
Please see the full Release Notes for the finer details:
Most of the focus for this release was on adding multiple languages and .NET Scripting support to #Script which now has first class support for #Script Code and Lisp! which should broaden its appeal to more use-cases thanks to its unique dynamism and extensibility characteristics.