Is this a technological metaphor?

For some Hacker challenge I was reading up on different keyboard layouts, Dvorak and stuff. And the technological lock in is baffling me: The rationale for qwerty was to reduce jamming of the typewriter letter arms. Today that doesn't make sense anymore, yet we stick to it. Wondering how much of today's tech is dragged down by things like that.

This stuff often also makes me weary of the first decisions, like choosing a protocol or data base - its kind and layout, because we might be stuck with it for reasons of backwards compatibility.... Like when Microsoft opted for the backslash as a directory separator..