yeah, this is an interesting thing to ponder. Great question. I've been "in" for most of my adult life....thinking it really only made sense for classic cars to be white letter or white wall.
but some of the pics attached here do look ok with letters out...so I voted out.
but then it depends on if you're sporting good tires or some cheap bottom barrel things....don't wanna be braggin' about junk tires.
Seriously though, I recall way back in time as a teen washing my parents' cars or probably some of my early rides with white letters or white walls..... there is something satisfying about spraying that tire cleaner stuff on and watching the brown sort of ooze right out of the white. So yeah, white out so you get to have that satisfaction