Next.js 4: React 16 and styled-jsx 2

This post introduces Next.js 4, highlighting support for React 16 and styled-jsx 2. It details significant performance improvements, including a 2.6x faster SSR with React 16 and a 20% faster style initialization with styled-jsx 2. The post also showcases the ability to embed dynamic styles (variables and expressions from scope) in styled-jsx, enhancing its utility for theming and animations.