There's a handful of gen Z at my work and my experiences have been similar. One can model and 3d print any object you want and does great photo and video editing, but is helpless at navigating the web without Google. If you tell him a URL he's going to type the whole thing into Google and click the first link. Similarly, he almost instinctively knows every keyboard shortcut for the programs he uses but nothing outside, even if it's the same one as the programs use, like ctrl+c/v.

There's something to be said about millennials having learnt a multidisciplinary approach to computing (I.e general use of computer systems instead of individual programs) that the walled gardens are eliminating through their united UIs.