I don’t know what is Apple’s endgame for the Fn/Globe key, and I’m not sure Apple knows either – Aresluna
"But it’s not just ergonomics. One new of anything means more cognitive load. Fluid and natural keyboard use cannot blossom when a system of modifiers and shortcuts is confusing, inconsistent even between platforms that Apple controls, and when any time you use a third-party keyboard, some keys are unavailable, and some menus lie to you."