BN2, some advocate not lowering the gear whilst the flaps are still running.
Others won't switch on the bleeds immediately after the APU comes on line.
Some say don't cool the brakes with the fan, arguing they're more efficient when warm.
And other do the controls checks reaaaaaallllyyyyy slllllooooooooooowwwwwwww in order to prevent...I have no idea exactly what.
And now you tell us to have some mechanical empathy by warming up an APU that's designed to be started at -56 C.
Noted.