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Most of the reviewer's comments aren't about anything new in 18.04. It's like he didn't see any of the 17.* releases?

A lot of people are on previous LTS versions. Both 14.04 and 16.04 still have support: https://www.ubuntu.com/info/release-end-of-life

edit: grammar

The reviewer does indeed say that they haven't used Gnome before, and didn't use Unity.