Main lesson seems to be, it's good to put icons on the standard, most frequently used actions. And make them colorful. That helps the eye find them.

Edit: also consistency and legibility. So basically "don't design it so it's bad!"

"On the upside: it’s not that hard anymore to design better than Apple!"

Good one to keep in mind.

https://blog.jim-nielsen.com/2025/icons-in-menus/