You can now launch AWS Cloud9 environments with Amazon Linux 2023 (AL2023). AL2023 is the next generation of Amazon Linux, a Linux server operating system from Amazon Web Services (AWS). AL2023 provides a secure, stable, and high performance execution environment to develop and run cloud and enterprise applications. With AL2023, you get an application environment that offers long-term support with access to the latest innovations in Linux. AL2023 is provided at no additional charge.
Source:: Amazon AWS