So, as bassists we like the low notes right? A low B makes sense then - we like that. Luvverly low frequencies. A fiver also adds some flexibility with playing positions on the neck. So 5 string basses then, spot on & make sense yes?
On that basis why bother with a four string bass, when a five has the same strings but allows you to do more? Four's seem to be so last year.....
Six (& more) string basses tend to have higher strings than a G. What's the point in that for a bass? We're bassists right & we want to be driving the rhythm section along at the deep end, not fannying about at frequencies where guitarists twat around in!
In case you missed it this post is a little bit facetious, but grenade lobbed anyway......! :-)