I want to move to HTTP/2 with TLS encryption, HPACK compression, and speculative push.

I'm ready to transition, but still need to support existing websites.

I'm OK staying with plain old HTTP.

I just need to serve static pages at blazing fast speeds.

I have Ajax web forms connected to back-end databases.

I'm building a REST API to support a mobile single-page app.

I'm already using Node.js for server-side solutions.

I still need to support classic web server languages like C#, PHP or Java.

I'm a polyglot, so I'll use whatever fits best.