Judge Gregg Costa memorably described the McDonnell-Douglas burden-shifting framework as “the ‘kudzu’ of employment law.” Nall v. BNSF Railway Co., 917 F. 3d 335 (5th Cir. 2019) (Costa, J., specially concurring). The painstaking majority and dissenting opinions in Addante v. Univ. of Tex. at Dallas, No. 05-20-00376-CV (Sept. 8, 2021) illustrate the amount of detail work required to evaluate a complex retaliation case and deserve study by anyone who practices in that area in state court.