Well... here are some reasons:
1. Like a 5-string bass, 6-stringers seem to fall into two groups. In one (like an older Rick 4003-5), the neck width is OK, but the strings are just too close together. In the other, the string spacing at the nut is OK for my thick stubby fingers... but the neck is too wide for my
short thick stubby fingers. My fingers are why I can't play guitars worth a damn - and why my Frankenstein Epiphone EA-260 12-string guitar - while it does play fairly well - is just a wall hanger for me...
2. I learned to play bass on a friend's '68 Rick 4001 - in 1968. And, every song I've played since then -
EVERY song - was, and still is, perfectly playable on a 4-string bass. In fact, I was practicing a new one this morning; Chuck Berry's
You Never Can Tell. To be perfectly honest? I only need 3 strings for that one. I might even be able to play it with just 2... A 5-string bass doesn't make any of those songs sound better, or make them one bit easier to play. A 6-string bass would just be one string more useless than a 5-er for me...
3. I do not have any need - at all - for versatility; extended range; or any of that... stuff. Anything I want to play (I'm
waay past "need to play"), I can easily play on any one of my 20-something 4 string basses. And, finally;
4. A
7-string bass? Don't be ridiculous. I doubt if I could even get my hand around the thing's neck...
