2) The focus on Emotions means less focus on individual personality for our sims. While this creates a fun, new way to interact with our sims, there are two issues that Simmers that prefer realism may encounter with this system: 1) Emotions can overpower one another creating constant emotional changes that are not necessarily realistic. 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.