IMHO, the traction potential of "modern" reactive coverstocks has significantly progressed, making for instance particle additives obsolete. However, this responsiveness come at a price, since new stuff has - from my experience - the tendency to read the lane either earlier or more violently. No wonder that urethane sees a comeback, because the stuff's properties fills the reaction gap that reactives have left (and also due to the fact that lanes appear to me to featiure less and less oil volume, so that strong covers are not an effective choice).
