Am in violent agreement with Aaron's insight in that:

A worldwide introduction of super honey bee stock, assuming that is
feasible, be it SMR or a AHB strain or SVE [Super Varroa Eater] or
whatever, will not be viable, for such “silver bullet” cure fails to
consider other myriad variables at play, at all times, in nature-—all
unforeseen and unknown in its long-term ramifications.  Microbes and mites,
assisted by us, however inadvertently, or independently, WILL evolve to
meet the new challenge they face, let alone the mutation and variation of
the super stock itself in due time.  Simply put, the struggle on both ends
(beekeepers' and mites') is never-ending; hence, to many, "Life is a female
dog and then you die."  Consequently, the battle to stay only one step
ahead of these opportunists should be considered a giant step in the right
direction.  Imagine how hard we will fight if we have to fight for the
survival of our own species. So will the microbes and mites.

Humdinger
(bloody American, not Korean)