@Stefan Attempts to make Linux — and because they just borrow from Linux, {Free,Open,Net}BSD — more friendly have mostly involved aping the look and feel of macOS/Windows, especially by designing interactions where every intention is forced through the path of click-click-clicking the mouse by hand, like an animal. In contrast, the NeXT team did some good work around making WiMP interfaces a more integral part of the system (scriptable with programmatic access to things that can also be triggered by the mouse, for example). Rather than embrace that approach, this set of suggestions goes right back to fully manual click-click-click.
I should say also that, although I hate this document's suggestions, my dream isn't Linux standardizing on some kind of OpenStep-over-Wayland. I'd really like to see someone trying for real innovation in the graphical shell space and aiming that work at FOSS operating systems rather than making some mock ups and hoping to get hired by Apple to polish their chrome.