I do think it yearns a bit for "average" or "tempered," at least when it's used as a work dress code/recommendation - not going too far in any direction. While it used to imply a suit, now I think that might be considered "too far" in that business casual direction (but certain fabrics would be fine like seersucker/corduroy/cotton). Similarly, I think "too youthful trendy" (or maybe just too tiktok these days) would seem out of place. Same goes for heavy use of workwear/streetwear. There's plenty of overlap, but "smart" to me is like "push to the center of the bubble."
I'm sure I'm wrong.