I played in my rock band with my 7 string (may soon have recordings for you) where I play the bass plus tap a melody out, whilst the guitar (also extended range) played ambient notes and overtones.
Me and my guitarist would play counter rhythms to each-other where I would tap a pattern and he would use that as a spring board to allow him to play more diverse idea for the lead guitar.
I also played finger-style, across all strings, no tapping, chording, and sometimes slap.
Not limited to tapping.
I also played an open mic night with my 7 string playing a Jazz/Rock mix which many people commended me on, and I was even offered a spot in a band.
I also played my fretless 4 at the same night.
Ive never heard such small minded-ness as saying ERB's are pointless, you cnat use them in a band.
If you dont like people trying new styles of music, or new methods of making music, why dont you burn all your basses and all your music.
If it was not for people pushing music and instruments further there'd be no point in music itself.
PS, that doesnt mean I dont respect classical forms of music and standard instruments.