>>127337712
When I try to do the Hendrix chord thing with thumb on the bass note like
3x543x
or
3x5433
I find it pretty uncomfortable and there's really no way for me to do it without getting the guitar neck right in the palm of my hand with no gap, making the twiddly little double stop hammer-on hendrix-isms pretty impractical and uncomfortable, if not downright impossible while holding that bass note down, such as
3x5435
3x545x
3x553x
3x523x
3x553x
Meanwhile, the thumb on the bass note works pretty well for basic "jazz voicings" (7th chords) like
5x555x
5x565x
5x665x
5x554x
though most jazzers tend to not do the thumb over thing.