i don't always use only conditioner leave in as a styler, but i frequently do, and this winter have almost exclusively done so, using ss dd as my leave in. in extremely low dewpoints, i do use a sealant on top when i sotc.
if you think about it, curly hair needs lots of moisture, and when it has the right amount, it curls pretty much to it's potential.

i find that my hair is softer, much less likely to frizz for some strange reason.

i do use stylers from time to time, one of which i use as a styler is beauticurls leave in conditioner! that really pumps up my curls.
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3a, some 2c & 3b, medium texture, porosity normal, low elasticity
washing/cowashing, conditioning, protein tx: [I] curl junkie products
leave in:cj conditioners and treatments as leave in
styling: cj aloe fix gel, cj pattern pusha, cj honey butta leave in, cj cccc, cj ciab.
sealants - jane carter nourish & shine