I'm not sure why people view Hendrix's work as "hard".... I was able to play Little Wing, with some decency within the 4th month... Now I can play it extremely well.

I mean, common now.... Stuff like Purple Haze, Foxey Lady, Voodoo Chile, and stuff are extremely easy. His rhythm guitar stuff like Midnight Lightning, Little Wing, Castles made of Sand, and All Along the Watchtower are somewhat more complex, and not heavily blues oriented...

Riffing under the pentatonic scale isn't something I consider "hard" by all means.