[jpulec]

Arguing that Tailwind is a leaky abstraction for CSS is like arguing that ORMs are leaky abstractions for SQL; hiding the underlying implementation isn't the point of these tools.

The biggest benefit is that you get a fairly well thought out API to work with. In the case of Tailwind, this a pretty flexible and good set of defaults that works for 95% of use cases. You can focus more on building classes for cases specific to your site, and not spend time rebuilding undifferentiated layout utilities.