CentOS 8， 21 年底 EOF，以后就变滚动更新了。 以后也没 CentOS 9 了
資深大佬 : alanying 10
https://blog.centos.org/2020/12/future-is-centos-stream/
最后一句话神了：
If you are using CentOS Linux 8 in a production environment, and are concerned that CentOS Stream will not meet your needs, we encourage you to contact Red Hat about options.
We will not be producing a CentOS Linux 9, as a rebuild of RHEL 9. Instead CentOS Stream 9 fulfills this role. (See Q6 below regarding the overlap between concurrent streams.)
大佬有話說 (3)