If by failed you mean widespread adoption. But I have been using Dvorak since 1999 on a variety of platforms without a problem. It's a personal success for me.
"the trouble it is for them to manage different keyboard layouts in their head. I wonder if that's the same for dvorak layout users."
It's only on extremely rare cases that I've been forced to use QWERTY (such as at a public library) and when doing so, it hasn't been hard. So I don't have to manage different layouts in my head. I only use Dvorak, and my hardware and software supports it.
That said, I don't do any heavy typing on an iPad...
If by failed you mean widespread adoption. But I have been using Dvorak since 1999 on a variety of platforms without a problem. It's a personal success for me.
"the trouble it is for them to manage different keyboard layouts in their head. I wonder if that's the same for dvorak layout users."
It's only on extremely rare cases that I've been forced to use QWERTY (such as at a public library) and when doing so, it hasn't been hard. So I don't have to manage different layouts in my head. I only use Dvorak, and my hardware and software supports it.
That said, I don't do any heavy typing on an iPad...