Clement's suggestions

docs/src/main/asciidoc/extension-maturity-matrix.adoc

@@ -150,16 +150,25 @@ Many of these characteristics come by default with the Quarkus framework or http
 
 === Logging
 
-Quarkus uses JBoss Logging as its logging engine, and xref:logging[supports several logging APIs]. Avoid using errors and warnings for conditions that will not affect normal operation. These outputs can cause false alarms in user monitoring systems.
+Quarkus uses JBoss Logging as its logging engine, and xref:logging[supports several logging APIs]. (This is normal Java logging, not OpenTelemetry logging.)
+
+Avoid using errors and warnings for conditions that will not affect normal operation. These outputs can cause false alarms in user monitoring systems.
+
 
 === Define health endpoints
 
-Extensions may wish to xref:writing-extensions#extension-defined-endpoints[define library-specific endpoints].
+Extensions may wish to xref:writing-extensions#extension-defined-endpoints[define library-specific endpoints] for health criteria which are specific to that extension. To add a new endpoint, extensions should produce a `NonApplicationRootPathBuildItem`.
+
+=== Tracing context
+
+You should test that OpenTelemetry output for applications using your extension have properly-defined spans. You may need to do extra work to ensure spans are created with the right OpenTracing ID.
+For example, extensions which have reactive internals should support xref:duplicated-context.adoc[duplicated contexts] for correct context propagation.
 
-=== Kubernetes integration
+=== Advanced Kubernetes and containers integration
 
 Quarkus is designed to be a Kubernetes-native runtime.
-Extensions can continue this philosphy by adding library-specific integration points with Kubernetes.
+Extensions can continue this philosophy by adding library-specific integration points with Kubernetes.
+Being Kubernetes-native implies being container-native. At a minimum, extensions should always work well in containers, but extensions may also have opportunities to integrate with the lower levels of the container stack.
 
 
 == References