Smartphone killed the calculator star. Some thoughts... and data too

[Joseph_21sv]

Maybe, if you will pardon the blasphemy, HP axed the electronic input facility from the 42S project because they had inside information on what features examination boards would preclude the acceptance of the calculator on examinations and never told the public that part of the story.
As to debrouxl's litany of calculator manufacturers' blunders, it misses unforced misfeatures:
* The Casio fx-62/63, 6800G, due to heaven knows whom, used a downright bizarre graphical display paradigm, in addition to which the 6200G had no memory for user keystrokes. Moreover, even HP got in on giving this display paradigm an afterlife in the form of the HP 9g.
* The HP 20/30b, due to a bad choice of display chip and display paradigm, ended up with only a semi-line dot matrix in its upper display window. Moreover, its USB port was virtually impossible to locate, preventing users from installing firmware upgrades.
* HP and TI did not compete with Casio on color graphing calculators until 2011, nor on icon menu graphing calculators until 1998, and Casio's graphing calculators were easy to beat on integration of operating paradigm.
* HP does not appear to be planning a new User RPL calculator now that the 50g is discontinued.
However, none of these can compare to the infamous "killer left click" in AmigaOS, for which see video #1 here.