CloudEvents (CE) has requested to move to the incubation maturity level:
The project was initially developed as a result of the CNCF Serverless WGs investigation into the Serverless landscape and determination that addressing this “middleware routing” pain point was a good initial attempt at trying to ease some of the challenges
faced by the Serverless community. Since entering the CNCF Sandbox, CE has released 3 interim versions (v0.1, v0.2, v0.3) as the specification has evolved and the project just called a vote for its 1.0 version. It is currently embedded by a variety of projects
and companies: Microsoft EventGrid, Serverless.com Event Gateway, Knative (Google), Fn (Oracle), Adobe - I/O Events, Codit, EventFlow, Eclipse Vert.x, Debezium (RedHat), Kyma (SAP), Argo-Events, Brigade and more.