> using iPads and Chromebooks is teaching them lies that come from user-hostile pseudoabstractions.
Only if you are using them wrong; while I think iPads are poor tools forany purposes, including that one, from a UI perspective (or, at least, inefficient by the time you address the interface issues), iPads and Chromebooks don't restrict the ability to teach full-spectrum computing, as, they are perfectly capable tools for accessing and interacting with general purpose computers.
Now, clearly, the exact details of how you use them in that teaching and th supporting infrastructure might be slightly different than if you were giving students PCs, but then, you need a network environment with educational infrastructure if you are teaching full-spectrum computing with modern relevance anyway, and the detail are going to vary by what you use on the front end. That doesn't rule out any front end choice, it just means that the front end choice impacts other choices.