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The ADR That Rots Isn't the Decision, It's the Assumption Under It

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The best thing about architecture decision records is that nobody's allowed to edit them. It's also the reason they quietly lie to you. Here's a concrete case. On July 28, 2023, AWS announced that starting February 1, 2024, every public IPv4 address would cost $0.005 per hour, attached or not. That's about $3.65 a month per address.

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