s class certification decisions under Rule 23(a)(2), an impact plainly manifested by the number of certifications overturned in its wake. See, e.g., EQT Prod. Co. v. Adair, 764 F.3d 347 (4th Cir. 2014); Rodriguez v. Nat'l City Bank, 726 F.3d 372, 376 (3d Cir. 2013); M.D. ex rel. Stukenberg v. Perry, 675