aepxc True, nature is stable. At least it is stable in the same sense as feedback control systems are stable: corrective feedback is applied to bring the system back under control. But there are several things in natural stability that we need to think twice about. You point out the downgrading of efficiency in favor of flexibility. There is also the fact that natural stability is long-term; it takes years or centuries for the corrective signal to bring back the system to the "design point". Finally, nature's mechanism for stability is often the extinction of species. If we're willing to live with the network equivalent of that, then maybe nature is a good model.
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