Before thing CG, I never had a problem with cones. I was washing everyday with a sulfate 'poo & straightening, so cones kept my hair smooth & frizz free.
After starting CG (modified at first), I found gentler surfactants, like coco betane, didn't remove all the water-soluble cones from my hair, even though they were supposed to. I never co-wash exclusively, so that wasn't a problem.
Of course, it all depends on the individual, hair properties, water quality, washing technique, etc...
I always sound like a zealot, but in my personal experience, polyquats & cationics build up on my hair way worse than cones ever did. Many of the cone-free products are loaded with them & it took me a long time to realize why my curls was limp, dull & stringy. Normal 'poos (anionic) only make them cling tighter to the hair shaft, compounding the problem.
Again, though, some curlies love 'quats, so your mileage may vary.
Sent from my DROID RAZR using CurlTalk App
2C/3A--med-coarse, slightly porous (highlighted), very dry & protein sensitive
Lo-Poo: Yes to Baby Carrots
Clarify: Suave Everlasting Sunshine (SLES)
Condition: Suave Naturals: Aloe & Waterlily, Daily Clarifying & Sun-Ripened Strawberry
Stylers: 4Naturals Spring Back Curling Custard, KC Spiral Spritz
On Hiatus: All MD & KBB
Avoiding: sulfates (except SLES) ‘cones, parabens, polyquats/cationics (except stearamidopropyl dimethylamine), most proteins/extracts.