But all the real goodness is in contain[2] (which sounds the same but is not related).
Tailwind really needs to support contain. I am disappointed by their statement that there will be no major additions, because contain is really that important - both from a dev perspective, and from a performance perspective. It belongs in v4 from the start.
[1]: https://github.com/tailwindlabs/tailwindcss/pull/12993