Software Design with John Ousterhout
Legacy Code Rocks
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The Importance of Rewriting Legacy Systems
It would be much simpler if they could be right from scratch, but that probably isn't possible. Even while you have like an ideal design in mind, that ideal design might not adapt correctly to the next change. So even if you think you have the perfect design, you probably don't. There's probably a lot of problems with it. And so now you end up having to react to those pressures in two different ways.
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