With tailwindcss or tachyons you get some of the benefits of component frameworks without having to use component frameworks, because you can colocate html & "styles" in regular template based systems and scope sections on a page this way. Great DX if you need to render sections conditionally, e.g. for ab testing.

If you think in sections rather than individual components anyway, which tailwind kind of promotes by design, you don't gain that much with a component framework.

The actual CSS functions like an inverted triangle (see ITCSS) the utility classes access from the html, so you won't have any specificity issues because it's already sorted out by having the CSS in a fixed order.

Another advantage is portability of sections between modern frontend JS frameworks and template based systems, you can just copy and paste things around, which is harder if the information about the styles is separated from the html, and without a fixed inverted triangle like CSS structure.