Observability 2.0 is a concept introduced by Charity Majors of Honeycomb, though she later expressed reservations about labeling it as such(follow-up).Despite its contested naming, Observability 2.0 represents an evolution from the foundational "three pillars" of observability, metrics, logs, and traces, which have dominated the field for nearly a decade. Instead, it emphasizes a single source of truth paradigm as a data foundation of observability. This approach prioritizes high-cardinality, wi...