I have three fives (and one six) that are 19mm, a five at 18, one 17 and I think one might even be 16.5.
They're all eminently playable, though at 63 I'm not sure I'd want to be gigging the TRB-6 these days and I'm not yet certain that I want to go to 17mm as a main. I'm getting ready to build a couple 32" scale 5-strings and will likely go with an 18mm bridge. I think that the Hipshot A-type with its plus or minus 1.5mm per saddle will allow me to go as wide as 18.75mm or as narrow as 17.25mm.
Regarding the narrower spacing making slapping more challenging, I agree with @Core Creek. If the desire is there to figure it out, it's just a matter of time and practice. Having said that, I can also easily understand someone preferring to spend their time on other challenges and sticking with whatever spacing they're used to.
They're all eminently playable, though at 63 I'm not sure I'd want to be gigging the TRB-6 these days and I'm not yet certain that I want to go to 17mm as a main. I'm getting ready to build a couple 32" scale 5-strings and will likely go with an 18mm bridge. I think that the Hipshot A-type with its plus or minus 1.5mm per saddle will allow me to go as wide as 18.75mm or as narrow as 17.25mm.
Regarding the narrower spacing making slapping more challenging, I agree with @Core Creek. If the desire is there to figure it out, it's just a matter of time and practice. Having said that, I can also easily understand someone preferring to spend their time on other challenges and sticking with whatever spacing they're used to.