Thanks for taking the time to reply in detail. its especially useful as a concerned parent to see the other side of the coin.
I really wasn't aware that ipads were so physically rugged compared to most Android pads. Given that cases are also available for most android tablets, and the approximately 3 android pads to 1 iPad purchase (and therefore replacement) cost ratio, I'm still not really convinced that the iPads increased ruggedness over any/all other Android pads is really as much of a justifiable argument for iPads in schools as you suggest.
I also still think Apple (or Microsoft) is the wrong way to go a a de-facto standard in educational computing tools because vendor-lockin means unavoidably brainwashing kids with the idea that the entirety of computing is only one corporations products. This is an especially bad thing to do when other more open, relatively brand-agnostic and still approximately functionally equal options do exist.
Also I really don't like the idea that this is all still an experiment to see if pads in the classroom are really a good/bad thing or not. My kid's education and therefore his entire adult life is directly at stake here, and there is no chance of a do-over if pads do turn out to be a bad idea.
I myself was similarly permanently fucked in the 1970's by the introduction of an experimental math program called SMP during my critical years at school. After a couple of years it was generally accepted that SMP was a massive cock-up and math teaching goet very quickly reverted back to the classical style, but it was too late for a whole generation of English kids upon which the damage had already been done.
COnsequently If there's still any doubt at all that pads might not be the best approach in school, I'd strongly prefer we take the low-risk option and stay with a traditional method (books etc) that we already know from centuries of experience works well enough.