#1
So I've been wondering this for a little while What would be the advantages of having more strings on a bass or guitar? Would it really expand your playing that much to have extra strings.

For example, one friend of mine has a 4 string bass, and another a six string guitar. I also have a six string guitar. So would it be better for us to have say a seven string guitar and a 5 or 6 string bass?

And if it is better, why aren't all guitars 7 strings, and why don't all basses have 6 strings.

The point it is that i know nothing about this, if someone could just explain what's going on with the string count that would be cool.
#2
it's a choice thing really, some people want the added range, others don't. i wouldn't say one was better than the other
#3
It's not necessarily better. It does allow for extended range which is nice, but some find it cumbersome to play when it has more strings due to things like a fatter neck, etc..
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