We know that the technology is more mature more is invisibile.
if I observe a bicycle I can understand as it works seeing the gears,
with one motorcycle instead I cannot understand if:
I do not open the motor
or if someone not standard me as it works
therefore if i use it:
I can be enough ready, to understand to the flight (but I will not never know to use it completely)
or to go road outside.
today I see that a lot is being concentrated in order to give one new garment to what already it existed, for example
the biotensor

that it is the old baton of stone in modern key
and however we are still speaking about I use passive (than it is believed less possible or) while in antiquity it was used actively.
But what I wanted to say that then to the fine ones they are the abilities to the man to make the difference.. for this also stopping itself to the surface R. Bandler & J. Grinder have entitled their book "The Structure of Magic" ( p.n.l.)
p.s. I have used the example of the batons but I speak about all the magical technology, as an example amulets, ritualism etc