Currently we're on v1.41.0 (which packages up jaeger UI v1.27.3)
Having skimmed the main [[ https://github.com/jaegertracing/jaeger/blob/main/CHANGELOG.md | CHANGELOG ]], none of the breaking changes look relevant to us.
Improvements / feature additions in Jaeger core that did look relevant or interesting:
* v1.55: Support for [[ https://www.jaegertracing.io/docs/1.56/sampling/#adaptive-sampling | adaptive sampling ]] when using Elasticsearch/Opensearch storage
* v1.55: way better logging of ES/OS storage errors https://github.com/jaegertracing/jaeger/pull/5209
The new release also bumps the version of the UI (packaged separately) to v1.40.0. There's many new features and rewrites of parts of the UI between now and then. Relevant or cool stuff:
* Visualization of the "critical path" affecting user-perceived latency: https://github.com/jaegertracing/jaeger-ui/issues/1288
* Big improvements in Jaeger's own rendering of service maps https://github.com/jaegertracing/jaeger-ui/issues/1466