Discussed during the Apr. 10th, 2024 Technical Committee Meeting, we'd like to move Exemplars specification to stable. To address the blocking concern https://github.com/open-telemetry/opentelemetry-specification/pull/3870#pullrequestreview-1952842576, this PR updated the wording to "SHOULD be on" (instead of "MUST be on"), if certain SDK implementations have performance concerns, they can decide to ship a stable version with exemplars OFF by default, and switch to ON by default later once the perf issue is solved (which is not a breaking change as exemplars are best efforts).
Unblocks #3870
Changes
Discussed during the Apr. 10th, 2024 Technical Committee Meeting, we'd like to move Exemplars specification to stable. To address the blocking concern https://github.com/open-telemetry/opentelemetry-specification/pull/3870#pullrequestreview-1952842576, this PR updated the wording to "SHOULD be on" (instead of "MUST be on"), if certain SDK implementations have performance concerns, they can decide to ship a stable version with exemplars OFF by default, and switch to ON by default later once the perf issue is solved (which is not a breaking change as exemplars are best efforts).