This thread is almost pointless now.
Basically as far as I can see, in my own opinion there's one bass (pun heheh) argument going on... Basically anyone who says more than 4 is too much is basically denying the right for instruments and consequently music to evolve.
You think, if we had taken that attitude years ago.. no electric guitar, no pianos, no bass, no lute... nothing. We'd still be hitting hollow tree trunks with the skulls of those who dared to tie string to wood and twang.
IF a person decides they want top play a 6/7/8/9/10/11/12/13 string bass, it is their right to be able to do it. Who is anyone to say "I think thats stupid, therefore I shall tell them they are wrong."
Im not saying more traditional instruments and more traditional ways of playing are bad either as once again that is your right to play how you want, and no-one has the right to say "oh but your wrong, why stick to just 4 strings?"
No-one in this thread really takes precedence over each-other and certainly has the right to tell anyone they are wrong.
Following this thought process, this thread should have lasted one page.
I play both Bass and ERB as well as Guitar. So what.
If you play solely 4 string. Good on ya. That's your choice.
If you play solely 9 string. Good on ya. That's your choice.
After Thought... Listen to the 18 year old with a bright red beard and dreads.