I find Deno very interesting. It's written in Rust by Mozilla, executing TypeScript by Microsoft on V8 engine by Google, and its name is sorted version of Node.

That aside, I have been very productive with Deno. Web Standards are going in the right direction, and Deno helps using them easy. The Request/Response model with streams make a lot of sense, and provides lots of way to optimize.

I understand performance is not the best compared to Elixir or Rust, but the ability to quickly download Deno, run a web server, import modules through URL, and start hacking and testing, then bundle into a cross-platform executable is a life-saver. No installation step, no build tool in between.