This really only works for relatively small sites that don't change much and aren't developed by multiple people. After that you'll at least want some static si

This really only works for relatively small sites that don't change much and aren't developed by multiple people. After that you'll at least want some static site generation (which by itself doesn't slow down the experience), bundling of multiple JS sources together (allows you to handwrite JS over multiple files without taking the perf hit of serving multiple files), and likely a CSS preprocessor (e.g. SCSS).