For your consideration.
I love SCM both for its music and the LSD lyrics, which Hendrix was a master of. That said, the use of feedback as a real musical tool more than a special effect, plus all of Hendrix’s other tricks and innovations, were all being played with in various ways a long time before that.
The Beatles “Paperback Writer” introed with feedback as did Steppenwolf’s “Magic Carpet Ride.” The Beatles were also already using backward loop recording consistently.
Hendrix’s style was sui generis. Unlike Clapton, he didn’t play repeating licks that built on each other; but unlike Beck, he didn’t go Full Monty and dive into solos that were more of an expression of how odd they could be without leaving the original song. I really can’t describe Hendrix.
I would call him “heay metal,” but certainly not in the vein of Iron Maiden or Metallica. That’s what makes him so evergreen-—his style was unique and so different from others’ that even today it seems new.