>CentOS 8 was never officially supported until 2029 so we did not go back on anything
The thing though is that RedHat is responsible for that impression. Every previous version of CentOS before 8 has been supported until the upstream RHEL pulled the plug. CentOS’s official page said it would be supported until 2029 ( https://archive.is/7Qmtw ).
A reasonable person would infer that CentOS (now controlled by RedHat, so, yes, RedHat) made the same promise that they made (and kept) with every previous version of CentOS: That it would be supported for 7-10 years. Not just over 2 years.
I definitely inferred a decade of support. If I would had known that CentOS 8 would be cut off at the end of 2021 this summer, I would not had installed it. I would had installed Ubuntu 20.04 LTS.
Indeed, replacing my CentOS 8 installs with Ubuntu 20.04 is exactly what I have been spending all last week doing.