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Its actually MORE expensive to implement a design which uses limited functionality hardware anymore. It used to be that functionality was minimized to save cost (fixed segment displays), but now that is no longer the case. Its actually pretty hard to find that technology any more. As the hardware becomes more capable/cheaper/available, the functional implementation gets moved into software...
Remember the IBM Selectric Typewriter? You used to change the fonts by changing the ball (hardware). Once dot matrix printing became available (and then inkjet, laser, ...), you no longer had to change the hardware to change the display (font). It is all done in software now...
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