> 'I want an arm that's so outrageously awesome that you'll cut off your own to get one.'

Probably not the first and definitely not the last time that idea will be tried in sci-fi (and out of).

I can't recall what story but there's one where operations people have twice the usual complement of fingers.

There's also a guy who hacked the interface for his prosthetic arm to directly control a sound board. Why go analog-digital-analog-digital-analog when you can skip two steps in the middle?