As it is still in beta phase there will be minor bugs in the device and might also affect the performance of the device.So if you can live with few bugs then you can join the Nokia beta labs and apply the update.
#AndroidOreo for #Nokia5 has landed on Nokia phones beta labs! Android has never tasted sweeter.
What’s more, Android 8.0 Oreo™ beta for #Nokia6 is coming soon! https://t.co/91uhqstnnm pic.twitter.com/0slgeNbfdC
— Juho Sarvikas (@sarvikas) December 12, 2017
Nokia Cheif Product Juro Sarvikas announced that Nokia 6 will soon receive the Android Oreo Beta update.Earlier Nokia 8 got the Android Oreo stable update within a month from Beta update and we can expect the same with Nokia 5 might get the stable Android Oreo update early next month.