.....but at the potential expense of all other aspects of a tone and feel that might not like or be appropriate for the music they play? I'm with WoT on this.....probably not a thing.
I find that different basses want different strings (obviously that sits within our personal preference for things). I had flats on my passive P/J Lakland 44-94 for a while, it sounded fine, but wasn't right.....I couldn't tell you why. Put some roundwounds on it, boom, perfect. Similar excercise with my 1971 Precision, it had rounds on it for a little while when I first got it.....wasn't right, but some flats on it....boom, perfect. My 55-01 had rounds on it for a bit, horrible.....put some tapewounds on it, boom, perfect.
To that end, I would suggest that all players, if they consider that a certain string isn't working for them, don't be all 'naaa flats/rounds are bad', just think that they might not be right for that particular bass.
Si