Sony XPERIA Z - is it the best supported smartphone?

This days we are waiting for official Android 5.1.1 Lollipop, but when i look to history, i see many important updates to this luxury and legend smartphone. I don't make any research, but isn't XPERIA Z the best supported Android smartphone ever? It start with Android 4.1.2 Jelly Bean and than it get Android 4.2.2 Jelly Bean, Android 4.3 Jelly Bean, Android 4.4.4 KitKat and Android 5.0.2 Lollipop. So now we are waiting for Android 5.1.1 Lollipop and i think that less of you know that developer XPERIA Z start with Android 2.3.7 Gingerbread (but this was not officially see). So will be Android 5.1.1 Lollipop stop for support? I collect all important updates and FTF in one article (it has audience more than 600000 readers). Which version Android you like the most?

XPERIAfirmware (all FTF) - http://xperiafirmware.com/8-firmware...xperia-z-c6603