The only theory that I could come up with is that there simply is no
extended profit in selling a machine/system that works so well and for so
long. There is far more money to be made on machines/systems that
perpetually require upgrades, maintenance and support.
Somewhat like a car that *could* be manufactured to function far longer than
todays average automobile life. There's only limited profit in that. It's
much more profitable to manufacture an automobile that has a limited life
cycle in order to perpetuate future purchases.
Just my too sense :)
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