I like the Jazz Bass width 1.5“ on my 4 string basses and exactly 1.75” On the guitar. No more. No less. .05” takes noticeable extra time (chording at least) and I don’t need more room and I can’t play it right with even .03” less. My hands are XXL - XXXL, long fingers. This is general since string spacing may vary.
I bought an OLP Stingray years ago, bought it exclusively for slap. When I played it, I wasn’t
able to play the stuff I had played before. I thought my slap chops were magically gone!
A few months later, I got a Jazz bass, wasn’t even set up for slap, played the same licks on it
Bam! Chops are back! Measured the necks, the OLP was like a standard, modern Stingray
wide. With the 1.50 Jazz neck, string crossing was cleaner.
When the ‘Musicman’ came out, the necks were thinner, then they went to a ‘P’ style neck.
They have since come out with a bass more like the original, the SLO Special.
So yeah, a little bit makes a
huge difference.
.