A related editorial discusses the findings of the study in the context of the outcomes of the KEYNOTE-189 study which had evaluated pembrolizumab in combination with pemetrexed and showed an improved overall survival and progression-free survival regardless of PD-L1 status (but patients with high PD-L1 expression (>50%) seemed to benefit more in terms of overall survival from the combination than did patients with low or no PD-L1 expression).