Tailwind is a tool that's absolutely for skilled CSS people (you still have to know what everything is doing). And it is much more maintainable for a large number of people working on styling.
Do you? I'm sorry but Tailwind takes quite a lot out of the CSS equation. You only have to learn what each property is doing. Then for example C for cascading, being a great feature of CSS, which with Tailwind you don't even need to know it exists.
Tailwind is just shorthand for CSS prop/value keys that also gives you an easily customizable and maintainable design system, which an increasing number of developers understand. That means that you can be productive immediately on a new codebase instead of having to spend hours getting your head around the multitude of CSS files that may or may not have been organized in a way that makes sense to you.
See - floats and negative margins are one of the code smells if are used to position things (yes, they have valid applications but in very limited use cases) that make me believe, that if you are still using them in 2021 then my worries about how Tailwind make dangerous shortcuts are valid.
You're still using CSS...just more efficiently.