OTEL-063
tail_sampling needs complete traces — groupbytrace is what assembles them.
OTEL-064
Stacking two samplers multiplies their rates and makes debugging impossible.
OTEL-065
An in-memory queue loses everything on restart or crash.
OTEL-067
Kubernetes receivers produce telemetry with no pod/namespace metadata unless k8sattributes is configured.
OTEL-068
Without resourcedetection you lose host, cloud, and node identity on every item.