there are a fair number with triple IRUs, dual GPS sensors, dual (or triple) FMSes, and dual auto-flight
No problem with any of that for the latter stages of takeoff, enroute and landing .... JBs have always impressed the daylights out of us all and I'm not immune to gee whiz stuff any more than the next fellow.
However, how do we effect the transition from manual flight to autoflight during the early takeoff stage in a manner which doesn't see the manual bit go outside whatever shape/dimension the trapezoid may be in a critical case with, shall we say, average pilots rather than those who might qualify for "Ace of the Base" brevets ?