Let me explain. After a year of rooting on the Droid X, which also has an encrypted bootloader, I've had to sbf (flash recovery) many, many times, as I was learning. Do I have to do it anymore? Not unless I'm going over to a second init rom, which I really don't do anymore as I'm happy with stock blur .602 rooted.
My son, however, is a classic tinkerer, a chip of the old block. I can see him playing around with things he doesn't know about and getting into trouble, bricking his phone. I'd rather wait till they get an sbf recovery. Then I won't have to worry when he says he's bricked his phone. (gone into a bootloop, got stuck at the boot animation or at the bootlogo).
Call me foolish, that's my threshold of comfort with this type of thing. When playing around with an encrypted bootloader, it's always best to wait until you have a recovery (sbf) to fall back on. Granted, there are no roms being flashed here, as yet, but still. I'm the father and those are my rules.