Introduction OpenTelemetry published version 1.0 of its Tracing specification over four years ago, and the same year W3C TraceContext Level 1 was published with W3C Recommendation status. We as a community and we the observability industry had two new standards for distributed tracing. Of course, we weren’t finished. Sampling is a major topic of the Tracing SDK specification, and the original specification included a set of built-in Samplers, AlwaysOn, AlwaysOff, ParentBased, and TraceIdRat...