I saw the announcment:
Which has a link on a page to open source chef downloads at:
The latest version for Ubuntu is more than 6 years old with Ubuntu 18.04. This operating system has been EOL on April 30, 2023. It is now October 2024. So my question: Is Chef Infra OSS no longer supported, as there has not been an update for 6 years, and extremely old operating systems past EOL are listed. The last version of this is 12.19.31.
The RedHat/CentOS similarly is showing only deprecated operating systems with CentOS 7 (now disbanded project).