Good answer. The interesting notion for me here, is the distinction between observability (including SLIs, SLOs, etc, not just ad-hoc observability a la honeyc

Good answer. The interesting notion for me here, is the distinction between observability (including SLIs, SLOs, etc, not just ad-hoc observability a la honeycomb.io) and testing in production -- they almost feel like 2 sides of the same coin. As really, the test in production is an experiment that is designed to measure something, which feels like it's just an SLI of some sort. Observability, I agree, is essential, but rather than thinking of it as a pre-requisite as you suggest, I'm thinking of the tests as a form of observability.