So i got a new game and wanted to check the update itself and found out it already carry Boot2v4 which means Nintendo is desperate for disable the hacks as soon as posible.
My Wii has Boot2v2 so accepting this update automatically update the factory Boot2 for the newer one, not only remove bootmii but also if you try to downgrade and it brick then that's it, even is dangerous to use any region changer or WAD manager to install channels.