Major upgrades are a non-issue on RHEL for the simple fact that when you are thinking about upgrading, your hardware is already obsolete (expensive to support)

Major upgrades are a non-issue on RHEL for the simple fact that when you are thinking about upgrading, your hardware is already obsolete (expensive to support) and you just migrate to a new machine instead of upgrading the existing one. Having a RHEL install supported for 10 years and then upgrading in-place just doesn't make sense in 90% of the shops using RHEL (that choose it exactly because of those 10 years of support).