There is one where desktops are slowly being remade, which Windows and MacOS are failing at. Have application repositories, but open ones like Debian or Linux in general, so that application developers can publish and don't ask for a cut of every sale. Sandbox all new desktop applications over the years and publish long roadmaps until everything is sandboxed, say, in 2035.

Provide more education and guidance for users and more corporate controls.

If they would have really started to do this in 2005, we would have been there by now. Instead we get more UI toolkits and more UI refreshes and AI everywhere.