The committee is now using yearly releases, so the "newest version" is outdated every year in June. The 7th edition is ES2016, and was superseded by the 8th edition (ES2017) finalised in June 2017.
I think it would be a bit more "correct" to say that each spec is outdated as soon as it is cut :) At least no one in the committee considers the last released spec "current" -- they prefer everyone point to the github repo.