Awesome, that’s makes total sense. Am I right in thinking the practices described here at Facebook are more like progressive delivery? As in, instead of adding

Awesome, that’s makes total sense. Am I right in thinking the practices described here at Facebook are more like progressive delivery? As in, instead of adding code to call out to some external feature flag or configuration system, new changes are deployed automatically in isolation and requests are routed to them progressively for larger and larger cohorts? All while validating the health of the change automatically?