Biomarker evaluation - c-statistic (AUC) and alternatives

thank you for this post. I have been reading about NRI, and I have found it very confusing. I dont really understand why AHA is justifying the use of NRI, which critically informs several of their recommendations in the new AHA lipid guidelines. I was unsure if it was perhaps some new or novel accepted statisticall approach to categorical or event rate NRI, but it seems a poor choice compared to alternatives.