We've got @scope back now, and, while it's not exactly the same as it was in the early part of the 2010s, it's still pretty good, as it let's you set both upper and lower bounds for a block of css. Being able to say "these selectors don't apply below this point" is immensely powerful, letting you build donut styles for components very easily
It wasn't quite ready when I wrote a sort of follow up article[1] about new CSS features largely eliminating the need for scss, but it's basically baseline now.
My personal new favorite feature is color mix and the other color compositional functions. You can do really neat tricks with them, current color, and variables, that are otherwise impossible, even with scss
[1] https://pdx.su/blog/2023-10-25-css-is-fun-again/