To them, a Vita that has never been downgraded below its factory firmware is "virgin." Using HENkaku on 3.74 without downgrading is an act of digital asceticism. You run HENkaku, install a few homebrews, but you do not touch the bootloader.
You are now running a pure PS Vita 3.74 HENkaku Exclusive environment. ps vita 374 henkaku exclusive