Well, Observability puts more of an emphasis on traces over logs and metrics, and even those can (and should be) be baked into traces.

In my previous company, we saw teams trying to do “Observability” primarily with logs and metrics, and it didn’t work. They STILL had difficulty troubleshooting.

Some references:

https://thenewstack.io/tracing-why-logs-arent-enough-to-debug-your-microservices/

https://kislayverma.com/programming/publish-events-not-logs/

https://medium.com/lightstephq/why-tracing-might-replace-almost-all-logging-790c7d7c5c2c