Looking at the "Delay" column in the release tables in Wikipedia, it appears that it's CentOS7 releases that have longer delays, the CentOS6 delays haven't chan

Looking at the "Delay" column in the release tables in Wikipedia, it appears that it's CentOS7 releases that have longer delays, the CentOS6 delays haven't changed in recent years (and there's nothing like the huge delays in 2011). Possibly because there are more packages being updated in 7? https://en.wikipedia.org/wiki/CentOS https://en.wikipedia.org/wiki/CentOS Package search is on https://git.centos.org/ https://git.centos.org/ For example, libvirt is at version 4.5 in CentOS 7.6, while CentOS 7.0 shipped with version 1.1: https://git.centos.org/rpms/libvirt/commits/c7 https://git.centos.org/rpms/libvirt/commits/c7 Whereas in Ubuntu 18.04 LTS, it's at version 4.0: https://packages.ubuntu.com/search?keywords=libvirt&searchon=names&suite=bionic&section=all https://packages.ubuntu.com/search?keywords=libvirt&searchon... The RHEL kernel's version number is doesn't signify as much as you'd think, there are whole subsystems backported into it from later upstream kernel releases.