Xperia XZ Premium already received Two major updates! (Android 8 & Android 9)
and will not receiving Android 10 because of Android updates cycle.
Cheek this:
Sony Mobile’s official Xperia Android upgrade policy outlined
https://www.xperiablog.net/2018/02/01/sony-mobile-official-android-upgrade-policy-firmware/
IF you want to receive 3 instead of 2 major updates >> buy Google pixel
IF you want more then 4/5 insted of 3 major updates > buy iPhone
