There we go
"because it takes a while for new firmware to wend its way through the alleys of the Android ecosystem"
Wondered how long it would be, before than lame nonsense was awkwardly pushed in.
This day and ago, it's mostly irreverent what major version of Android you are running, they all get security patches, and Google Play Services handles the much of the new platform functionality. The big version OS update only really bring OS feature tweaks.