It is, yes, and because everything Nancy did, ASP.NET Core can now do - it really is a vast improvement over the old ASP.NET. There is another OSS project, Car

It is, yes, and because everything Nancy did, ASP.NET Core can now do - it really is a vast improvement over the old ASP.NET. There is another OSS project, Carter, that builds on the ASP.NET Core goodness, allowing you to define endpoints the same way as you did in Nancy.