Well...as I've actually flown the Stratocruiser (although it had been just slightly ahhh, enlarged from the original design

), it was a very nice flying aircraft, but rather complicated electrically...and then there were the engines, Pratt&Whitney R4360's...
very smooth in operation (almost turbine-like) however extremely complicated bits of machinery (a supercharger
and a turbosupercharger), that consumed enormous quantities of oil (never mind fuel) and, on some models, were fitted with Curtis-Electric propellors, the complexity of which would glaze over the eyes
of the most attentive of mere pilots...
Stratocruiser, the operation of which, best left to the Flight Engineer....and an old experienced one, at that