It’s easily customizable
It's tiny in production as Tailwind CSS purges all unused classes, so it can make a production build as small as possible.
Dark mode is available out of the box.
You can extend it, tweak it or change it effortlessly.
The VS Code extension is available, so you don't have to remember all the helper classes.
It is easy to include it into NextJS or Create React App.
You can add animations with tailwindcss-animatecss, which extends helper classes with animation classes.