Nobody suggested rewriting Excel or even customising libre office. These projects are often ERPs which get customised to the client's requirements. Chaos and ballooning costs often follow for all the usual reasons.
My point is "completely different than the other government" is only true to an extent. Even with significant customization, there's still a lot shared which benefits immensely from economies of scale. As you said, nobody's rewriting Excel.
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Nobody suggested rewriting Excel or even customising libre office. These projects are often ERPs which get customised to the client's requirements. Chaos and ballooning costs often follow for all the usual reasons.
My point is "completely different than the other government" is only true to an extent. Even with significant customization, there's still a lot shared which benefits immensely from economies of scale. As you said, nobody's rewriting Excel.