Actually, looking at some examples, this is absolutely atrocious markup. Tons of empty divs with random CSS properties that are invisible and take up zero space. Hardcoded color values that should use the Tailwind color scales.

My bet is that they made some designs with WYSIWYG in Webflow, and automatically converted them to Tailwind.

EDIT: The dead giveaway is that they’re not using Tailwind’s breakpoints, but instead hardcoded ones, that happen to all be the same as Webflow’s hardcoded breakpoints - 478, 767, and 991 pixels.