I think it's more "justifiable" (if we're using that term) to have bags of the same color than it is to have say, 9 Speedys or something like that. Black is a color that goes with everything. It's practical. It's timeless. It makes sense to me that black is your go to color. If you're spending a lot on bags, to me, black seems the most practical. Now if you had 9 black bags all in the same style, yeah, I'd kind of think that was rather stupid.