Captain Sim, thank you for linking your above statement to some other feedback within the forum.  I think that your explanation is so good that it is a shame that it can't be linked to the support forums of every major complex sim developer, because I believe they are all experiencing the same short sighted misunderstanding from their consumers.

I have always been extremely impressed with what I consider to be the artistic audio, visual and interactive beauty that is expressed in a complex accurate simulation like the 757 Block F.  I have always wondered about and suspected that there must be a herculean amount of work and frustrations that go into completing a product that replicates to a satisfactory degree (not to mention the high degree of the 757 Block F), the most complex piece of machinery in existence for the general public to enjoy at such an affordable price.

Your explanation has enlightened me on this as, I'm sure, it has many others.  I think it should be added that these simulations not only have to strive for stableness, accuracy and realism, but also have to interact with a hodgepodge of other add-on programs which many times, are running in multiples along side the sim.  Real airline software doesn't even have to put up with weather simulators, passenger simulators, voice simulators, checklist simulators, moving map flight planners, scenery enhancements, etc. running within it's calculations.