and I was quite surprised how little “desktop” focus there is in the spec. It’s like the design team simply have forgotten that we have this thing called a “desktop” computers, where we use these oldschool interactions called mouse and keyboard.
I have similar experience, recently just starting to learn Mac development. The getting started guide for creating Mac desktop app is 3 years old and using XCode 4, whereas the iOS guide is updated and polished.
And I had a mixed experience with my Chromebook. It is great for web-browsing, but most of the apps available are designed primarily for mobile devices and feel weird to use. The "desktop" version of them usually just involves opening a tab in Chrome or in an resized individual window. I don't know if the developers are too lazy to design for desktop, or they are clueless to how they should do it.