CentOS is dead, long live CentOS Stream
Red Hat has announced an end to the CentOS distribution as we know it. CentOS will be replaced by "CentOS Stream", which looks like a sort of beta test for changes going into Red Hat Enterprise Linux. Support for CentOS 7 will continue as scheduled, but support for CentOS 8 will go away at the end of 2021. "When CentOS Linux 8 (the rebuild of RHEL8) ends, your best option will be to migrate to CentOS Stream 8, which is a small delta from CentOS Linux 8, and has regular updates like traditional CentOS Linux releases. 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."
More information can be found in this FAQ. "CentOS Stream will be getting fixes and features ahead of RHEL. Generally speaking, we expect CentOS Stream to have fewer bugs and more runtime features than RHEL until those packages make it into the RHEL release."
Update: see also this blog post from Chris Wright.