IMO, SUSE does this right. SLES 15 (and OpenSUSE leap) is supported until 2031 and it was first released in 2018. You do need to apply updates, but that's the

IMO, SUSE does this right. SLES 15 (and OpenSUSE leap) is supported until 2031 and it was first released in 2018. You do need to apply updates, but that's the point of support. You can take any version of linux as is and run it for 20 years with no updates, no changes, and no support. In my experience, SUSE also rolls from major release to major release with very little problem, so upgrading to SLES 16 is probably an in-place upgrade. EDIT: also, RHEL never did this right in my opinion. They lock the kernel for a decade, SLES updates the kernel.