> Why does Red Hat not choose one release of Fedora and release that as a
version of RHEL?(after all the rigorous testing)
They basically do this. Which is also why we in Fedora Infrastructure don't really see a major benefit to running an OS just because the word "Fedora" is in /etc/redhat-release. It all started in Fedora and fed into RHEL. It's a slightly liberal view of dogfood but not so crazy.