To be able to drop into an (e.g. rr) debugger on condition (e.g. by replicating that node's state ~State Share ) might result in a less appropriately comprehensive automated test suite, or faster tests?

Looks like Jaeger (Uber contributed to CNCF) supports OpenTracing, OpenTelemetry, and exporting stats for Prometheus. https://github.com/cncf/landscape