My problem is always been on sites that have a menu or something similar at the top. The anchor always inevitably goes to the very top of the screen gets covered by whatever menu it is.

It solves many of the pain points Tether[0] tried to solve.

For example it helps when the anchoring element is inside of an oveflow hidden/scroll container, but geometrically you need the tethered element to sit/extend outside of the container (so—for now at least—its DOM node needs to be outside of the container).

[0] https://tetherjs.dev