Asp.net Core is cross platform, has a self hosted https server called Kestrel that is insanely fast, has a really sensible composition of middleware, built in DI, and a strong community. Hangfire is a great job runner, signalr is available with real-time push over web sockets, identity server 4 can handle all your Authn/Authz and Entity Framework Core + Linq is very powerful and a lot faster than the full framework version.