Pin behaviour - superseded feature? Pin with image point says no

Pin to image point. The hierarchy cannot achieve that.

Imagine a sword pinned to the character's arm.

Now the character performs a complex 20 frames animation, a whirlwind.

The hierarchy, as far as I know, cannot be placed in relation to an image point, so this would have to be manual work, to check if that animation is playing, put the sword at the point, etc.

That's why the Pin behavior is still there and the manual terminology around it being superseded refers to most (not all) features being replaced by hierarchies.

I look forward to the day when the Hierarchy can set the origin position of the parent object to be passed.

It's difficult to see how it could be implemented like that, as it doesn't necessarily know which object will be its parent, and its parent's image points could vary across different animations and frames. A good example of a feature that looks obvious but is in fact probably impossible in that form.

Not looking forward to report a bug with Pin but to be closed since it's not recommended anymore.

There are also rope and bar pin modes which can't be done with hierarchy.