Bose,
It is not a matter of wanting to hang onto history, its a case of having to fly a piece of aviation history
Mind you I reckon I will still fly with a wheel in the pocket even if I did fly a new fangled machine.
CG,
How accurate do you need to be? The wheel is easily accurate enough given the quality of the forecast wind, fuel gauges etc. Yes our flight planning software works out our fuel requirements to the nearest lb, but that is less than 0.1% of our hourly burn. The wheel goes to the nearest 10lbs which is easily good enough.