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Thanks, these examples confirm my point. The old, ancient, "outdated" (as the original poster claimed) software worked fine for years/decades. The failures that

Thanks, these examples confirm my point. The old, ancient, "outdated" (as the original poster claimed) software worked fine for years/decades. The failures that you cited were introduced during an upgrade, a rewrite/outsourcing, or due to a 3rd party outage.

snovv_crash 5y ago
But requirements change, so upgrades are a normal part of business, due to at the bare minimum legal reporting requirements changing, even if there weren't all sorts of new things like internet banking making their old APIs inadequate. If the software isn't extendable or changeable then it isn't 'working fine', because if you can't offer internet banking or do FATCA reporting you go out of business or get shut down.