Where immutable infrastructure isn't possible, asynchronous configuration management with file and package watching, auto-sharding changes, and auto-retrying binary downloading devoid of excessive runs doing nothing useful except spiking CPU and "broken" runs for dumb reasons like Wi-Fi network changes. Breakage should be limited to a single tree of resources while the rest keeps going. Stupid conf mgmt like Chef explodes at a certain point and usually gives up.
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