While the Buckfast bee gains more and more popularity, because it is the better bee. Just is and this speaks for itself. Everyone with own eyes sees that, so with the oldtimer carnica people dying out, there hopefully will be some progress.
The only problem now for the Buckfast is the hunt for the varroa resistant bee and VSH selection. It creates a real narrow bottle neck, only queens from a few breeder (one...) are used in all major Buckfast mating stations. I think, that'll backfire in the near future.
I still enjoy my Elgon (Erik Österlund)+buckfast wild mixture and for me I see some nice varroa hardiness (not resistance).