No, they haven't. Tailwind is basically just a lot of utility classes which you use to set css values.

Other frameworks generally combine multiple properties with their classes.

It is a very different design choice with it's own up and downsides but equating it to bootstrap is just silly.

It's more realistic to compare it to directly setting style attributes on html tags then bootstrap, but that wouldn't let you use responsive modifiers/dark mode nor be as concise.