When Nought was in existence why Samsung released A7 2017 with outdated OS version and hence this is the reason we are claiming for the ANDROID PIE update with latest ONE UI.
S5 and A5 2015 are ok the Dame level:
S6 and And A5 2016
And the S7 and A5 2017 will stay on Android 8
Like some people said the s6 will get Android 8...
It's not true.
We will see if it gets Android 9 or not.
And I don't think so.