Yes but bootMii as an IOS isn't so good.
The preloader 0.30 should install at an another slot than the systemMenu (in his video, he delete the slot of the systemMenu).
So, it can potentialy resists any nintendo's update. To add, if Crediar write his own IOS with Mini, Preloader will works without any code of nintendo.
So it will resists update and will be launch at the begining (before the bootMii if we can't install it as boot2).
Then, with preloader 0.30 we will be able to launch bootMii without anything (nor SystemMenu nor HBC) and will allow us to recover from brick more easier.