Sure, 2015/2016 had the last burst of ~fun pop, although it was still less maximalist than 5 years before, but Royals was kinda the template of where the mainstream would go as the decade progressed. Lowkey production, songs that are more rhymtic than melodic, moody, more personal and introspective / less glamourous lyrics, those avocado vocals, etc. Yeah there were Adele and Bruno who also didn't do the electro-pop, but Royals was the first example of the 'colder' turn for the mainstream music that would come. I'd include the trap fad that plagued us in here too, and while of course Royals isn't that, it's much closer to it in vibes than idk Rolling In The Deep. (Or anything by Bron To Die for that matter lmao why are her stans polluting this thread).