One of the selling points for The Sims 4 when it launched was 'Emotions!!!' In this iteration, a sim's current emotion affects their interactions, which is intended to produce smarter sims. The Sims 3 brought us open worlds, which finally let us take our Sims around their entire town/city/world without loading screens. The Sims 2 introduced aging, which was revolutionary compared to the Sims 1 where only babies aged up and children-adults remained the same. Whenever a new Sims sequel series is launched, there is always a new feature lauded as an innovation over the previous entry in the series.
