I have an odd reason for preferring a lined fretless:
So when I bring it on gigs, the BL doesn't know that it's fretless.
I of course choose my fretless gigs wisely, but there's a lot of flack about fretless basses that'll get flung around by some bandleaders. So the lines make 'em think it's fretted, and they stop listening to me as soon as we start playing, so it's all good.
I still play with my ears and not my eyes, I can get all the mwah I want (or no mwah at all, if I don't want), and nobody says anything different.
YMMV
So when I bring it on gigs, the BL doesn't know that it's fretless.
I of course choose my fretless gigs wisely, but there's a lot of flack about fretless basses that'll get flung around by some bandleaders. So the lines make 'em think it's fretted, and they stop listening to me as soon as we start playing, so it's all good.
I still play with my ears and not my eyes, I can get all the mwah I want (or no mwah at all, if I don't want), and nobody says anything different.
YMMV