"Pretty much every school in the US has students using touchscreen Chromebooks."

Pfff, what a laughable claim. Meanwhile, just because people CAN use to learn something doesn't mean it's good. Touchscreen computers, especially laptops, are dumb for a few reasons. They already have a touch interface (the trackpad), and touchscreen on a computer requires dumbed-down interfaces with oversized controls and an M.O. that tolerates your hand and arm blocking your view of what you're trying to work on.

And also the screen's hinges must be (and perpetually remain) stiff enough to sustain people pressing on the screen the whole time.

With people doing so much on phones and tablets now, you can bet that when they fire up a legitimate computer, they want a computer's capabilities. That means a real keyboard, a precision pointing device, and software with a proper computer UI.