I, for one feel that dual coils are very overrated ... whether it is a PT style device, and an RBA, I don't see, or feel the benefit of dual coils. And contrary to common belief, I don't feel that they produce more vapor at all ... a warmer vape perhaps, but not more vapor ... or flavor. A 1.2-1.5 single coil is plenty warm for me, and with adequate air flow it produces a ton of vapor.
I truly believe that most of the "dual coil hype" stems from the placebo affect of mass conditioning ... you say anything around here more than once, some people seem to just pick it up, take it as law, and repeat it without any actual discernment within their own direct experience.