The Sims 4 will continue into 2018!

@Erpe It's normal practice in the arts - everything from Renaissance oil painting to contemporary game design - to make mockups of possible designs in cheaper materials using faster processes, then, after the preferred design is chosen (by you yourself, the patron, your supervisor, whatever), to start the final product separately in the more expensive materials and slower process. Michelangelo did it (if you're lucky, you can find an exhibition that shows design proposals and final work side by side - I went to one like that a couple of years ago), every sculptor who ever worked in bronze did it (the samples are often called "maquettes," and some museums display those as well as final work), and the game design disciplines do it.