Does this really apply to typing, though? To what extent could one suffer from long-term injuries due to the way they're typing? I know one can suffer from repetitive strain injury if they are not using their mouse properly, but does this extend to keyboards as well?
If you have poor form when typing you can put considerable stress on your wrists and compress your shoulders.
That's why ergonomic keyboards are so big, weirdly shaped and sometimes split. They all try to force you into typing in a way that won't do as much damage to your body as slouching over a 10keyless microkeyboard would.