[fainpul]

From the NN/g article:

"older versions of MacOS featured a menu designed by NN/g principal Bruce Tognazzini; that menu did not exhibit this behavior, but instead, used a vector-based triangular buffer to allow users to move diagonally. Unfortunately, in the years since, Apple has reverted this excellent bit of interaction design."

But I'm on macOS 15 and the menus seem to behave that way (the good way). Did they re-implement it?

[robinsonb5]

Yes, they did eventually. If I'm understanding correctly, the original design used a simple funnel shape with 45 degree sides (suitable for the resource-limited systems of the day), and when they eventually re-implemented it they used a funnel defined by the left hand corners of the submenu, as per the Amazon design. (See the large animgif halfway down https://thomaspark.co/2011/10/making-menus-escapable/ )