Rust, definitely. I'm actually most interested in the possibility of using it for some of the areas that people are currently using Go (CLI tools and back-end W

Rust, definitely. I'm actually most interested in the possibility of using it for some of the areas that people are currently using Go (CLI tools and back-end Web). Rust actually already has a lot of the selling points of Go and in the long-term I think that Rust will outdo Go in some ways, but the HTTP stack is still maturing. Elixir, possibly. It may be a good next move for Rails shops, but I'll see if the community grows a bit. .NET Core if we get interest from my employer's customers. Very preferably not on Windows.