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The biggest ripoffs were the textbooks. Especially the textbooks written by the teachers, themselves, who forced you to buy them.

The cost of these devices isn't the computation, and if anything more connectivity would probably make these more expensive and harder to use (many "smart" devices in classrooms have networking issues and if even one of them can't connect, it hurts the ability to run a lesson). I think standalone computation abilities are pretty important, and connectivity can be a downside for preventing cheating in standardized exams etc.

It doesn’t have a qwerty keyboard. That would be such a pain to type on.

For some reason qwerty keyboard calculators are banned in tests.