The LTS to LTS upgrade path usually isn't enabled until a point release anyway. For example, the the 12.04 to 14.04 upgrade wasn't enabled in the software upda

The LTS to LTS upgrade path usually isn't enabled until a point release anyway. For example, the the 12.04 to 14.04 upgrade wasn't enabled in the software update application until 14.04.1 was released a month or two after the initial 14.04 release.