You know, I have never actually considered this aspect of "cyborg-life". Given how much I slouch at desks all day, yeh, a life saving kidney digging in my ribs would get annoying !

I suspect it would just be an internal version of the parental "stop slouching dear". Users might report better backs as well as kidneys !

And just to be clear, Science and medicine makes amazing advances each day and decade. I am astonished by the idea this even is close to working.