Looking at the State of CSS 2024 results. Anchor positioning came out first in the "CSS features you can't use yet" question.

I agree! We can't get this soon enough to get rid of complex and costly tooltip positioning JS code. And, we can all help by applying some pressure!

Firefox implementation bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1838746
Safari implementation bugs (couldn't find just one parent bug): https://bugs.webkit.org/buglist.cgi?quicksearch=css-anchor-position

Vote. CC yourself. Add comments to let your use cases known.