I find such active anchors incredibly distracting. It’s like something blinking at the side (or top) just because you’ve scrolled a bit.

Regarding the purported problem they solve, maybe browsers should have an option to show current-heading information, similar to how IDEs show in which function or the like you’re in within the current source file.

The blur he put on the floating UI elements was also distracting af.

I would spend political capital not to hire this person.