Earlier quoted context omitted.
While its not default you can get it very easily on Linux and its ready on OSX, just need to pick it. No idea about Windows. For pair programming I use keyboard with hardware Colemak, my pp partner can use whatever that way ;)
Yes, but now what happens when you need to use someone else's computer? It just makes life a little bit more annoying. De facto standards tend to be very important, so much so that the optimality of that standard is less important than the existence of a standard. I happen to use colemak, but I recognize it was not a rational decision.
Perhaps I was not clean enough. When I use sb else computer for a longer time I bring my hardware Colemack keyboard with me. If its just a minute or two, I use my now lame touch typing qwerty skills, I'm much slower then Colemack but still faster then most of 'normal' people.