Also useful for local dev (you can still use it locally without a SaaS backend) and it helps with interoperability. Infrastructure like Envoy and nginx can emit

Also useful for local dev (you can still use it locally without a SaaS backend) and it helps with interoperability. Infrastructure like Envoy and nginx can emit spans that integrate with 1st party code and other 3rd party code. OSS libraries are more likely to implement an open standard so they just plug and play and emit data for internal things they're doing (especially helpful for things like DB and HTTP)