> QWERTY has a steep learning curve as well, it’s just that it’s so ubiquitous that most people don’t question or remember the work that was put into.

This assertion ignores crucial differences in the basic mechanics of typing in a standard QWERTY keyboard (i.e., look at the keyboard, press one key, get the desired character) and using a stenograph/chorded keyboard. A standard keyboard's discoverability makes it incomparably easier to ramp up than guessing which key combos get you a specific character combo/word.