Android 9 has been released a week ago, considering the update cycle of many vendors I would be very surprised if Samsung would be able to install Android Pie this year on the Note 9. I have a OnePlus 3T and when it came out, late 2016, it came with Android 6, OnePlus promised Android 7 before the year ended, they did it with literally less than 1 hour to spare, I was a little surprised though since the OOS (Oxygen OS) is nearly plain Android, but then they gave themselves a month or so.