A lot of comments seem to think that Tailwind is just a way to save a few keystrokes at the expense of legibility and leanness.
For me, the value comes from not having to jump all over a codebase, not having to name so many things, having clearer scopes and pulling things like colors and spacings from a central config.
I know there's a hundred different ways to solve those issues that wouldn't offend CSS purists but ask 10 different people and you'll get 10 different answers with 10 different caveats.
So I use Tailwind to write fuckugly markup in a faster, easily iterated way that will be instantly familiar to anyone who knows Tailwind.