A5/A7 2017 were released with an outdated 6.0.1 marshmallow while other phones released at the same time were running nougat.
Samsung claims that it gives A series phones 2 major updates but this was not technically 2 major updates because they were released with an outdated os version an unfair update policy for the A5/A7 2017 users,we consider this cheating!
Phones that were released in the same time as A5/A7 2017 but they were running nougat
LG K10 (2017),LG K8 2017,Huawei P8 Lite (2017),Nokia 6,Honor 8 Lite,LG Aristo,Huawei Mate 9 Pro,OnePlus 3T, HTC U Ultra,Asus Zenfone 3s Max,ZTE Blade V8.
There's a Rom! I typed a long reply but it got deleted):
Anyway theres a Rom. No bags. Someone made the South Korea A7 2017 Android Pie One UI Rom an international version. It's for A5/A7 2017 Available worldwide!! All languages supported!!
You can try it out for yourself!!
Today i installed a custom rom android pie for my A7 2017 ... its really work great even better then officiel oreo rom ... fast and great battery ... no need to wait samsung to bring pie